In the summer of 2022, my friend Casey posted a post on social platforms about her husband Yang Xiaoworm's "not very pragmatic" hobby - making a steam train that can carry people. The train is finally nearing completion, which she calls a "miracle." A few years ago, I happened to hear Casey talk about Worm making a little train, and I thought it was just a Lego-like building toy. That's when I realized that what he was making was actually a "real" train that needed to run on railroad tracks and could carry people. This Ph.D., who had studied materials science for six years and originally wanted to do "big things", was completely fascinated by a steam train after encountering it by chance. The little train finally ran successfully in the early spring of 2023. The train gauge is 15 inches, second only to the industrial equipment level with a track gauge of 30 inches. To achieve this specification, there are currently few individual players in China. Seven years had passed since the idea for a train first came to mind. In the past seven years, in order to teach himself how to make small trains, Yang Xiaoworm bought back professional periodicals from abroad, each about 2 centimeters thin booklets and various locomotive books, stacked nearly one meter high; painstakingly make your own molds, and then find a factory to cast parts; He moved all the second-hand lathes, milling machines, and CNC machine tools he found into his home, and his home was piled up into a small factory ......Casey didn't understand Yang Xiaoworm's "hobby" for a long time, and she didn't take it seriously. Can a train, still steam, something that sounds complicated and "made by the state", really be made? Even if you do, what are you going to do? But when she saw the first small train** and the first one to move**, she was "moved all of a sudden, and suddenly realized that it is good for people to have a hobby". She began to envy him. Me too. I like Casey's comment on Yang and the train: "Everyone is like a ship, there is a storm on the sea, it is impossible to refuse and irresist, we are always in the storm to go back and forth, but everyone tries to find one or more ropes that can be thrown to the shore to stabilize the hull." Some people's rope is work, some people are family, children; Some people may have more than one thin rope, and some people may have only one, but they weave it thicker and thicker. ”Yang Xiaoworm is the one who, although he only has one rope, is "weaving it thicker and thicker". 
1 Incredible
On June 25, 2017, Yang Xiaoworm built a "Steam Train Model Forum". He wrote an "invitation letter" to his girlfriend at the time, Casey, who worked in the content operation of a new ** company, hoping that she could serve as a "publicity consultant" for the car-making project. It wasn't a formal invitation, but it wasn't a joke either, and he hoped Casey would take his business seriously. Casey verbally agreed, but still felt that it was unreliable. "At that time, he only had ideas, he just knew the circle, and you showed me a drawing that I don't know where it came from, and then told me that you were going to make it into a real car, I thought it was incredible. ”"Incredible" things happened one after another. At that time, Yang Xiaoworm was still a Ph.D. student in materials science and engineering at the University of Science and Technology Beijing, and one weekend night, he carried more than 20 pounds of "Tie Tuo Tuo" from Xueyuan Road, first took two bus stops, then changed the subway again, and then walked 15 minutes to Casey's company in Baiziwan, the whole journey was more than 20 kilometers, and it took an hour and a half. When he got out of the subway station, he wanted Casey to come over and help carry it, "It's really heavy, but she won't come out." Casey was working overtime at the time, ** immediately pushed, she let Yang Xiaoworm walk in by himself, he was angry and refused, and sat under the street lamp to rest like a bum. As for why he carried these things all the way away, Casey's understanding was that "because they were his treasures, they were precious, and he had to keep them in a place (safe and convenient) and play with them every day." Yang Xiaoworm was still living in the school dormitory at that time, and he was going to put them in his girlfriend's residence. Casey provided evidence for her "trick theory". One winter, she came back from overtime late at night, was about to go to bed, lifted the quilt, and there were three "Tie Tuo Tuo" lying next to her boyfriend's pillow, she was angry and felt funny, thinking that it must be Yang Xiaoworm looking at these icy and heavy pieces of iron before going to bed, touching and touching, so that after falling asleep, "Tie Tuo Tuo" was left on the bed. The "Tie Tuo Tuo" in Casey's mouth has a more accurate name in Yang Xiaoworm, and in front of me, he corrected Casey several times, "That's not called Tie Tuo, it's whether the parts are good or not." They were all parts needed to assemble the steam locomotive, and he painstakingly made molds and then found a factory to cast them. Moving them to Casey's rental house, he also has his own interpretation. He said that it was only because they all needed to be refined, and the machining master he was looking for was in Yizhuang, "so it was closer to the south." Sometimes, Casey watched Yang Xiaoworm take pictures with those parts, took pictures of them from all angles, and repeatedly looked at the details and processing was not in place, and remembered that a postdoctoral friend once showed her a diagram on his computer, with the x-axis and y-axis, some numbers and a string of curves, "Anyway, I look at it as a normal mathematical diagram", but the friend was very excited to tell her that this was a diagram that he had carefully calculated, "I said what do you want me to see?" "The other party back, the beauty of mathematics. "I don't understand it at all, so I can't feel the mechanical beauty of Yang Xiaoworm. ”
Casey's "Iron Tuo Tuo" In 2016, when the two first fell in love, Yang Xiaoworm was still an exchange student in the United States, he liked to buy second-hand and even third-hand film cameras, in order to bring the machine back to China, he threw away his clothes and vacated his suitcase to load the camera. Casey thought he liked photography, but later found that her boyfriend couldn't see what he was shooting, and she realized that Yang Xiaoworm was really obsessed with machinery. Many film cameras are purely mechanical, and the same is true for steam trains. In the world of steampunk, there are almost no integrated circuits or tubes, relying on sophisticated gears, connecting rods, and transmissions, and pure machinery that uses the classic force to the extreme is the mainstream. In the first year of their relationship, Casey's 30th birthday gift to Yang Xiaoworm was a wallet. By the second year, Yang told Casey that he wanted a wax machine. "I don't even know what it is. "By the third year, the gift became a 3D printer. Once, the two went to Huairou to climb the mountain, and there was a railroad track connected to the Daqin Line nearby. In order to shoot a train coming out of the tunnel, Yang Xiaoworm stood on the side of the road for at least half an hour. In the evening, he happily showed it to Casey: "Do you think I did a good job?" At home, Yang Xiaoworm bought back the professional journal of the steam train, each about 2 centimeters thin booklet and various train books stacked nearly one meter high; From 1982 to 1994, the British model train magazine Engineering in Miniture was indispensable for a year, and he also managed to put together a CD engraved with drawings and archives of American steam locomotives, and then read them one by one. Because of making a steam train, Yang Xiaoworm has made many friends, including migrant workers, policemen, second-generation factories, retired soldiers, and winery owners, ......For a while, Casey's heart was unbalanced, and she found that Yang Xiaoworm talked to the friends who played the steam train in Tianjin for several hours almost every night. "I said that you fought with me at work or school, but I haven't seen such a long (time) fight. Recently, she has been based in Shanghai due to work transfer, and occasionally goes back to Beijing on weekends, but she and her husband often don't have the right time, and Yang Xiaoworm's weekends are either to find friends in Tianjin, or to Zunhua, Hebei Province to see the progress of the production of the steam train. Casey was a little "jealous": "I asked him to come to Shanghai to find me on the weekend, he was too embarrassed, he used to go to Zunhua before dawn in the morning, take a five-hour hitchhike to there, and he didn't see him crying tired when he returned to Beijing that night or the next morning." ”The steam train mobilized almost all the enthusiasm of Yang Xiaoworm. And of course, money. At present, his overall income is not high when he works in a central enterprise, and he always says "I want consumption downgrade", but mainly refers to the fact that he rarely spends money on clothes and shoes, and he is not distressed at all on the steam train. Sometimes he was afraid that Casey would talk about him, so he would secretly buy it back first and then quote Casey a fake price. Once he bought a desktop-class steam train model, and the ** reported to Casey was 8,000 yuan, but he actually spent 10,000 yuan. If the above is still within the scope of Casey's attempt to understand, then the moment Yang Xiaoworm moved the lathe, milling machine, and CNC machine tool into the house, the boundaries in Casey's heart were completely broken, and the two broke out many quarrels. What was their home like? The living room has green plants, bookshelves, beautiful sofas, retro ceiling lamps hanging above the vase, and two cute cats lazily stepping on the IKEA tabletop, which is the kind of "exquisite" look that will be praised when you take a picture and put it on the Little Red Book. But now, on the other side of the home, there are more than 200 pounds of large, broken and rusty machine tools of Yang Xiaoworm. Casey had tried to block them with a painting or mirror, but once the machine started workingThe messy electrical cables, the metal chips floating into the shoes, and the buzzing noise made all the "camouflage" meaningless at once.
Speaking of these, Casey's expression was painful, work had made her so tired that she vomited, and she couldn't accept that she had to go back to a factory-like home after work. But Yang's focus is different. He turned on his phone and showed me a ** of a CNC machine tool, proudly emphasizing that "this is a machine that I saved myself". There is a corner of the house dedicated to his train models and drawings, and he specially hung curtains for fear that the sun would damage the machine; Worried that the machine would be "lonely", he folded a flower that Casey bought and put it next to him. When Casey asks to move the machine during the argument, he always says the same thing: "Life can make me happy, put in a little bit, and feel like I'm doing what I love." You want to have a beautiful bookshelf at home to put your favorite books, put green plants in a big vase, you have put them all on, I don't want a big bookshelf or sofa, I just want this machine tool, they are not easy to come by, although there is no way to work at home now, but they are here, I feel at home when I come back and see it, I am very happy. ”#Complex funWhen I met Yang Xiaoworm for the first time, he gave me the 0618 machine tool modeling drawing he drew in 2019 in an A4-sized, very delicate wooden photo frame. The 0618 machine tool is a desktop small mechanical metalworking lathe. 6 represents the maximum processing length is 600 mm, the 18 finger center height is 180 mm, and the rotation diameter is 360 mm. Casey reminded me that "he's more of a science and engineering mindset," and that was fully confirmed in the hours that followed. Do you think I mean he's not good at words, or that he's only yes or no? On the contrary, Yang Xiaoworm is very talkative, but he has his own system of speaking, and he is by no means a person who asks one thing to say. For example, I want to hear him talk about why he is so interested in building a steam locomotive, and even regards it as something that must be completed in his "lifetime", he does not answer my question directly, but starts with "1. Background" like a voice. What preparatory work is needed for the manufacture of steam trains, what periodicals must be read, from which channels can you buy drawings, how many factions of steam train players at home and abroad, who is the master of Japan, which company in the UK makes a good steam train model, how exquisite is the craftsmanship of an old gentleman in Taiwan, what is the profit of a company that makes a steam train model in China, how is the progress of the folk players in Shanghai, Tianjin, Hebei, Northeast, Sichuan, and Guangdong, and even how to cast, pour wax, and pour the mold during specific operations, What are the ...... of how to reduce the cost of making molds through 3D printing and persuade factories to be willing to accept small ordersYang Xiaoworm gushed to me. It was only after confirming that I had a general background on the steam train that he got to the point. "Some people have a natural interest in mechanical things, like me. So, in 2016, he was immediately drawn to a small-town park in Pennsylvania when he saw locals "having a good time" playing with steam trains. This attraction is not only because of the machinery itself, but also because of the sense of purity that does not care about cost, demand, efficiency or even environmental protection, and only focuses on what you love. As if he had been touched by a god, the steam train triggered the feeling that he wanted to try it himself. "Later, when I actually started to do it, I realized that it was very difficult and brain-burning. "But Yang Xiaoworm likes to challenge complexity. In his words, "Simple things don't make much sense." Since junior high school, he has loved physics and once dreamed of being a theoretical physicist. The beauty brought by "unity" and "universality" made him feel magical. "From a physical point of view, everything that happens in the universe has a unified law behind it, and as long as you find the equation of this unified law, you can describe everything. Like creation, it is derived and spread from the simplest and most core principle. Influenced by this kind of thinking, Yang Xiaoworm was not happy in high school, although he had good grades, many problems that he wanted to figure out were not clear. "I found that our textbook is flawed, it does not start from a point and establish an axiomatic and systematic discipline through layer by layer deduction, but a large number of complex knowledge points for you to memorize directly. During the doctoral stage, Yang Xiaoworm chose "phase field" as his research direction. This is a phase transition simulation method based on the Günzburg-Landau phase transition theory, which is mainly used for computer simulation of phase transition problems in materials science. It can be roughly understood as combining mathematical, physical and computer methods to solve materials science problems. He gave me such an example of a real-world application. For example, parts in the automotive and aerospace fields should be melted off the metal first when casting, and then poured into the mold, the metal will be cooled in the mold, and a lot of microstructures will be formed during the cooling process, which determines the mechanical properties and life of the parts. Applying the "phase field" model, before casting, the microstructure of each area can be theoretically calculated, and it is prone to defects - however, there are many factors that affect the measurement and calculation, which leads to its actual value is not very high, a bit like the weather forecast thirty years ago, which has a certain value, but the results are still qualitative. Regarding the research on "phase field", not only Yang Xiaoworm's brothers and sisters had not done it, but there were very few people in China who did this direction at that time. With almost no precedent, Yang Xiaoworm could only cross the river by feeling the stones. "I think it's simpler, on the one hand, I think I can learn more deeply in physics and mathematics, and secondly, I still like to challenge some difficult things. Of course, I know if I can figure it out. "It's the same with deciding to build a car. To build a small steam locomotive, it usually takes hundreds or even thousands of parts, and the process of each part is different, which requires the maker to spend hundreds or thousands of different times pondering and polishing each part. In Japan, it took 13 years for a master steam locomotive to build the first model car. This kind of project that is persuaded to quit as soon as he hears it, Yang Xiaoworm enjoys it. Casey has a quote that sums it up accuratelyWithin the scope of Yang Xiaoworm's ability, complexity is a pleasure and enjoyment for him. 
The "gift" that Yang Xiaoworm gave mePerfect commaAfter deciding to build a steam locomotive, Yang Xiaoworm also thought about apprenticeship, and asked some masters who made steam trains for advice, but the communication was not smooth. On the one hand, it is difficult for the experience of the masters to replicate the experience of large engineering equipment on small equipment. Making a car is a systematic project, each master is responsible for different types of work, everyone only understands their own mess, like the chief engineer Yang Xiaoworm has not yet been found. On the other hand, the masters are not easy to invite, they don't believe it, and they don't look down on Yang Xiaoworm's "petty fights". For a long time, he was "consuming" by himself. The correlation between machinery and materials allows Yang Xiaoworm to understand the process drawings. Like disassembling a math problem, after reading the drawings of a car, he first thinks about how each part in it is produced, how it is assembled, and what processes it will go through. "The principle is not difficult, but it takes some effort to visualize every part in it. Many parts are not made by machine tools alone, but need to be cast. "Casting requires a place to put professional equipment to meet the high temperature working conditions, and the molten metal must also be able to provide 380 volts of industrial electricity, which is not an easy task for ordinary players. Yang Xiaoworm does not have a systematic machine, second, no space, and third, does not have sufficient funds. He had to figure it out on his own. The mold is a "big money slender" - because the parts that need to be cast are different, the corresponding mold also needs to be customized, some parts themselves are only worth dozens of dollars, but the mold costs four or five thousand - he thought of designing the mold himself, and then printing it out with a 3D printer, so that ** from thousands of pieces to dozens of pieces. "You see, in the process of solving these small difficulties and challenges, I have found relatively innovative methods. ”
Wax model made by Yang Xiaoworm
There is also the problem of finding a factory in the manufacture of small trains. "For example, if I want 10,000 gears, the factory will immediately get them for you, because the volume is large and the profits are high. But if we only do one or two things, unless we have frequent business dealings, people will do it for the sake of friendship, otherwise they will hardly care about you. ”Over the years, Yang Xiaoworm has had three "partners" in car manufacturing, Beijing police Xu Ge, Tianjin factory second generation He Ting, Hebei factory director Liu Wei. In order to find a factory willing to take on the work, Yang Xiaoworm and Brother Xu went to Beijing Xiaohongmen to find a small workshop, and at that time, due to environmental protection issues, all the nearby small factories were required to move to Langfang. "Brother Xu and I are ...... like doing illegal transactionsAs soon as he finished saying this, Yang Xiaoworm remembered the scene that day and couldn't help laughing. In order not to be found by the patrol police that their homes are still open, the small workshops all pulled down the roller shutter door, a boss saw the two looking around, quietly beckoned to them, the roller shutter door pulled out half a person high, after the two entered the house, the iron curtain was pulled back to the ground again. "Just follow up ***. Yang Xiaoworm felt that this scene was a bit "black humorous" - the police dodged the police. The second "partner" Heting in order to win the factory to help them do machining, talk about the cooperation of the father's factory situation to the other party, "words" is, my family has a large factory, the amount of cooperation in the future must be in place, but the first cooperation, you first help us process a few small parts, we see how the effect is, the specific matters and our Chief Engineer Yang docking. After speaking, he left Yang Xiaoworm's ** to the other party. Speaking of these, Yang Xiaoworm was so happy that he couldn't keep his mouth shut. The first two "partners" were suspended for some reason, and the car-building plan was on the right track, thanks to the third "partner" Liu Wei. Liu Wei is a "middle-aged man who is not boring", he likes to mess around since he was a child, and is known as "Watt Liu". When Yang Xiaoworm first met Liu Wei, he only knew that he was a "rich man" with many industries, and there were not only workers under him, but also plants and equipment. Once Liu Wei wanted to help a park in Zhangbei to make a decorative antler, Yang Xiaoworm used paper to build him a palm-sized antler model, but only two days later, Liu Wei made a deer head decoration more than 3 meters high according to Yang Xiaoworm's origami. Since then, Yang Xiaoworm has realized that Brother Liu's hands-on ability, action, and workmanship experience are extremely strong, and he can indeed do some things. At the beginning of 2021, the two began to officially promote the construction of cars. Yang Xiaoworm is mainly responsible for drawing out the design drawings and focusing on the detailed work, similar to the role of "chief engineer". "For example, if I make several holes in a plate, I need to come up with a CAD drawing so that the laser cutter can understand how thick the board I need to cut. Sometimes I need to process a few special gears, and I can't find a factory to do it in China, so I go to the Internet to check a lot of information. It takes longer to search for it than to understand it. "Yang Xiaoworm himself also belongs to learning to become dry, first learn by himself, and then teach the master of the factory. After he handed over the first version of the drawings to Brother Liu, the other party sent the first ** of the progress of the train chassis within a month - not only all the parts were completed, but also the assembly had begun. "His construction progress has started to push back my drawing progress. I knew the little train was almost there. Yang Xiaoworm drew a version of the design drawing, and Brother Liu produced the parts little by little according to the design drawing, and then assembled the ......Two years have passed in such a steady process. 
The little train came into reality At the beginning of 2023, one night, Yang Xiaoworm received several ** that made him "can't wait". The picture quality is "clumsy", and the shooting angle is also very bad, it is Brother Liu who started the steam train that has just been able to go on the track, and the small train is running for a test run. This is the first time Yang Xiaoworm has seen the small train he designed smoke into reality. Although the car still has the problem of falling off the rails at the turn, at least, "it is a complete product, it really moves, this is a milestone progress, a successful 'comma'". Yang Xiaoworm himself watched the ** many times, and showed it to Casey and sent it to the group of relatives and friends to show it. "Everyone was very shocked, saying that two or three of you could make such a thing, they thought that it could only be made by a factory or a state-owned enterprise system, but in fact, we realized it little by little in a small workshop. Yang Xiaoworm later came to Zunhua to guide the maintenance of the small train. Before returning to Beijing to work, he and Liu Wei put the small train on the truck body and pulled it to the park to prepare for another test run. It was an early spring afternoon, the park was yellowed by the sun, and the white magnolia was budding on the side of the road, and after they laid the tracks, Liu Wei drove the black and red steam train with a gold edge embedded in the edge, and with the sound of the whistle, the train came from a distance with white smoke "woo woo". Yang Xiaoworm stood aside and filmed a 24-second **. When it finally landed, I was very excited, very excited. The speed of Yang Xiaoworm's speech is speeding up. The car was all too familiar to him. "You take out every part, I know how it's made and where it's installed." Every part. "When the track was repaired, the little train couldn't run a little, Yang Xiaoworm quickly found the place where the stuck shell was, and twisted it with a wrench, and the little train immediately returned to normal. 4 A rope of rope Yang Worm succeeded in building a steam train, which was like witnessing a miracle for Casey. Before that, she almost didn't pay attention to the progress of the little train, and after seeing the real thing of the first little train** and the first one moving**, she was "moved all of a sudden, and suddenly realized that it's good for people to have a hobby." Indeed, in the past seven years, Yang Xiaoworm has had many difficult moments whether he is studying for a doctorate or working, and the small train has once become his sustenance. Let's just say do a PhD. In 2013, Dr. Yang Xiaoworm successfully applied for it, and his supervisor was a well-known expert in nuclear power plant materials research in China. However, just after studying for the doctorate, the supervisor went to Sweden because of work and family needs, and during the entire doctoral period, Yang Xiaoworm and his classmates could only see the teacher once a year. Under normal circumstances, doctoral supervisors need to keep an eye on students' experimental progress and provide academic guidance and hardware support. But now that the supervisor is gone, the senior brother and sister have different research directions, "no one wants to communicate with you, and there is no hardware support for the experimental equipment, and no one is urging me to make progress, as if I have been completely 'isolated'." Yang Xiaoworm enrolled in 2013 and did not graduate until the end of 2019. He did a good job with the data at hand, but he didn't want to write ** for a long time. It's not because I can't write it, but because I always feel imperfect. "Maybe you're too demanding of yourself and always want to do something 'big'. ”It takes a long time to convince yourself to finish first and then perfect. When the pressure was at its highest, Yang Xiaoworm and Casey also went to the Lama Temple to make a wish. Casey was worried that building a car would affect Yang's studies. Several times she sneaked into his room to see if he was writing ** or drawing train drawings. If it was the latter, she would be anxious for him. "I don't think you have graduated yet, you haven't finished writing, and you're going to find a job later, and you complain to me every day that it's hard to graduate, but you still draw a picture of a small train, and you don't do your job. "I was almost insulated from the train in 2019. Yang Xiaoworm interrupted Casey, and he had the impression that he had almost stayed up all night when he wrote the last three **. In many notebooks, there are words he wrote to himself at that time: only do things related to graduation. "But sometimes you can secretly open the blueprints of the little train at night. Write ** halfway through and from time to time to get a steam train magazine to read. "That's when I'm confused, I'm very tired, and I don't know what to do, but turning over the little train can distract me and relieve my boredom." ”
Casey, who studied hard, admitted that Yang was under a lot of pressure to graduate. One day, Yang Xiaoworm stayed up all night to write **, and it was already more than four o'clock in the morning after writing, and he ran to the side of the road downstairs in the community and sat in a daze. "No one can help with this kind of thing like graduation, so I have to figure it out by myself. At that time, I felt very depressed, so I wanted to go out and take a breath. In 2019, Yang Xiaoworm completed three publications in half a year**, one graduated**, and finally graduated successfully. After graduation, Yang Xiaoworm first went to Beijing Institute of Technology as a postdoctoral fellow for two years, and after leaving the station in 2022, he is now doing research and development in this central enterprise. Neither job is satisfactory, strictly speaking, it sucks. When he was a postdoctoral fellow, Yang Xiaoworm had a boss with a strange personality, including but not limited to arguing with a female teacher and flipping the table, thinking that the female student who dyed her hair was indecent, Yang Xiaoworm took the boss's students to dinner, and he asked if he was talking bad about him behind his back after eating for so long. One night at 11 o'clock, the boss sent a text message to Yang Xiaoworm: "I killed two flies in the office today. "I really can't decipher what you mean by what you say is alluding to here. Yang Xiaoworm didn't reply to this message, and blocked the boss. Now working in a central enterprise, Yang Xiaoworm doesn't want to talk about it, but only uses one sentence and eight words to describe it. One sentence is: Rushing around, you go and get rid of Tang monks and apprentices; Eight words: formalism, serious internal friction. Unlike when talking about the little train, his eyebrows flutter and he occasionally laughs out loud, when he talks about work, he always frowns, sighs, and is always indignant when he talks about the workplace. But as soon as the topic turns back to building a car, his expression instantly switches back to joy and even excitement. When he was worried about work and couldn't give him "results", he relied on the small train to find a "sense of landing" and a sense of achievement. "No matter how bad I am, the steam train is at least still running on the tracks, and it is running quite well. "Back to the original question. After seeing Yang Xiaoworm's little train, Casey sighed that it was good for people to have a hobby. She has witnessed first-hand how important it is to have something to rely on when there is great uncertainty in the work and external environment, and people are not sure. I like her comment on Yang Xiaoworm and the little train: "Everyone is like a ship, there is a storm on the sea, it is impossible to refuse and resist, we are in the storm at any time to drift back and forth, but everyone tries to find one or more ropes that can be thrown onto the shore to stabilize the hull." Some people's rope is work, some are family, children, and some people may have multiple thin ropes; Some people only have one, but they weave it thicker and thicker. I think for Yang Xiaoworm, he now has at least such a rope, which is not thick and a little thin, has been put on the shore. When you're about to fall, this gripper can provide a sense of security. "I asked Yang Xiaoworm, do you think you're lucky? Fortunately, there is a little train? "Yes. But if I hadn't made a little train, I'd have found something else. That might be another story. Postscript: Yang Xiaoworm and his friends spent more than 500,000 yuan to build a car. During the whole process of building a car, he never thought of making money from it. It's just his hobbies and "little ideals". But the success of the first steam locomotive also gave them some new ideas. At present, Yang Xiaoworm's biggest wish is to find a suitable venue in Beijing and set up a small studio, so that he and his friends' machines can "settle down". The venue is still in the process of being found, but there are two pieces of good news he would like to share with you:First, he and Liu Wei are working on two new models, and the scale of the next car will challenge the 30-inch gauge industrial equipment level. Second, their small train has been trying to carry people in a ski resort in Zunhua, Hebei Province, and if it goes well, it is expected to take a small step towards commercialization. 
Yang Xiaoworm and Brother Liu at the ski resort where the small train is in trial operation.