I remember that in "Young Marshal", Zhang Dashuai once said to the young marshal: "The rivers and lakes are not about fighting and killing, the rivers and lakes are about human feelings!".If Zhang Zuolin really said this sentence in history, then it would be impossible for him to dominate the Northeast. Because this sentence is more like a product of "office philosophy", it cannot adapt to the complex and changeable historical environment of the late Qing Dynasty and early Republic of China. The so-called: how complex the historical environment is, how complex the characters will be. 
On the whole, Zhang Zuolin is a multi-faceted hero. It has not only the atmosphere of the rivers and lakes, but also has a very keen speculative heart, and has a larger pattern. Therefore, the spirit of the rivers and lakes is Zhang Zuolin's "skin", the speculative heart is his "guts", and the larger pattern is his "soul". The above statement is best illustrated by the incident that took place in 1916. As everyone knows, in 1907, Zhang Zuolin retaliated for two of his subordinates being killed by the Japanese, and then killed three Japanese, so he was sent to Mongolia by Xu Shichang to suppress bandits. At this time, Zhang Zuolin can be called full of rivers and lakes. 
But when it came to the Zhengjiatun incident in 1916, people saw a "reborn" Zhang Zuolin. Because a child accidentally spit watermelon seeds on a nearby Japanese soldier while eating watermelon, he was beaten by the Japanese soldier. It just so happened that Zhang Zuolin's subordinates, the soldiers of the 28th Division of Feng were also present, and naturally no one wanted to see the Chinese being beaten, let alone a child, so they went over to dissuade them. Unexpectedly, the Japanese were even more arrogant, and the two sides were already dissatisfied with each other, so they fought hard, and the Japanese soldiers suffered losses. This caused a commotion in the Japanese military camp, and they were all arrogant. So the Japanese officer, with a few people, came to the Fengjun garrison and demanded that the so-called "culprit" be severely punished. When he refused, he drew his command knife and slashed a Fengjun. The incident escalated from a fist and foot brawl to a shootout. 
After the Japanese officers returned, they erected cannons outside Zhengjiatun and declared: Zhengjiatun strictly forbids Chinese to enter, otherwise they will be killed. This was followed by a series of excessive demands. Judging by the reaction of the Japanese, it must have been in the shootout that they suffered again. What is the reason for China's territory, but not allowing Chinese to enter?All walks of life in Mukden were furious. In particular, the hot-blooded young people of Fengtian Normal School were even more sad and angry, and their reactions were the most intense. The 28th Division did not agree, and set up an "anti-Japanese iron and blood regiment", vowing to fight the Japanese soldiers to the end. But Zhang Zuolin didn't say a word, and sent the 27th Division to surround Fengtian Normal School and suppress it strongly. Seeing that the commander was like this, the 28th Division naturally didn't dare to make trouble. Later, Zhang Zuolin went to the Japanese garrison in person, apologized, and punished the so-called "** soldiers" in the Feng army, arrested radicals, etc. It has completely become a "cartilage" appearance. 
Compared with the toughness in 1907, why did Zhang Zuolin become so unproductive in 1916?Just because, now he has become the boss of the Northeast, known as: King of the Northeast!In 1907, the boss of the Northeast was Xu Shichang. Therefore, at this moment, Zhang Zuolin has always wanted to get Japan's support, so he took the opportunity to transform this "Zhengjiatun incident" into a "flattering Japanese action". Zhang Zuolin's attitude really made the Japanese side very satisfied, and from then on he no longer supported the Zongshe Party, but began to support Zhang Zuolin!It can be seen that this incident is completely a speculative act by Zhang Zuolin!
Where do people come from in the rivers and lakes?Some only have the exchange of interests, it depends on how to play!In this regard, in fact, Zhang Xueliang also understands this truth, for example, he also bows, etc., which is the same as Zhang Zuolin, and it is also an exchange of interests. This father and son are similar in nature. It's just that Zhang Zuolin is more wild, and Zhang Xueliang is more reserved. If the real difference between the two is that Zhang Xueliang is lacking compared to Zhang Zuolin, it is actually the cognition of the pattern!
Zhang Zuolin is a very ambitious hero, he has always wanted to change his image as a hero or warlord, so he decided to go south to use troops. It happened that Zhang Xueliang rushed back from the front line, and after hearing about this, he came to dissuade him, the reason being: What Japan hopes for most is that our army will go south, and if they copy our back road, we will be miserable at that time. But at this moment, Zhang Zuolin changed his "flattering image" in 1917, slapped the table and roared: "I have 300,000 Northeast Army, so I'm not afraid of Japanese devils!."He had killed 13,000 people in South Manchuria, and in order to clean him up, I summoned the county magistrates and public security chiefs of all counties in Liaoning for a meeting, and took down his railroad in three days. The Northeast Army first attacked the important town of Dalian Lushun, how could he fight me with 13,000 people?What Japanese devils am I afraid of?”
These remarks can be regarded as the key point, and they point to Japan's weakness. Since Zhang Zuolin can see Japan's weakness, he can be sure that there are naturally corresponding arrangements, which make Japan very uncomfortable, and it has obviously become a roadblock for them. This is actually the real reason why Zhang Zuolin was killed in Huanggutun.