In today's era of advanced information and convenient transportation, there are more and more opportunities for economic development. Many countries around the world are committed to joining the wave of the global economy, and it seems that every country, and even everyone, wants something from it. However, there is one country that prefers to stick to one place and enjoy the "lonely world" of poverty and abundance more than to participate in the fierce and vigorous economic battles of various countries: Bhutan. Bhutan's international status is not high, and the overall national strength of the country as a whole is also at a low level. If it were other countries, they would be likely to look for countries that could provide them with asylum, such as South Korea, which chose the United States to be their backer in order to get better development. In the face of such a national situation, Bhutan has not done anything to change the status quo, and even continues to be complacent, guarding their "one acre and three points of land". 
Today, Bhutan is as closed as the Qing Dynasty in the 19th century, and there are no more than 20 countries that have diplomatic relations with it. Even China, which borders Bhutan, is not on its list of diplomatic relations. In fact, Bhutan was a vassal state of China during the Qing Dynasty. In the 19th century, China was suffering from invasion and political turmoil from the West, and although the Qing Dynasty was in a precarious state, it still held supremacy among many vassal states. Bhutan is one of these vassal states, and the flag of this country still retains its original shape even today, the four-clawed golden dragon, which is the emblematic motif of the vassal flag. When Bhutan was a vassal state, it was influenced by Chinese culture, especially Buddhist culture, and even now Bhutan still inherits the culture of that time. So, in many places in Bhutan we can still see Tibetan Buddhist architecture and so on. 
In addition, Bhutan is located in the Himalayas, and although its geographical location is not conducive to the development of the transportation industry, its environment is very beautiful. Due to Bhutan's seclusion, tourism has not developed there. On the other hand, it is Bhutan's "alternative" approach that allows the country to maintain a beautiful environment. Due to its isolation, Bhutan's economic development is very backward and it often needs economic assistance from other countries. Bhutan's backwardness and poverty are at the forefront of the rest of the world, and even then, it is not clear that Bhutan has adopted an open national policy. Finally, in the seventies of the twentieth century, Bhutan's borders were opened, and people from other countries had the opportunity to learn about it. Curiously, after the opening of the borders, Bhutan's closure did not improve, and it continued to develop at a slow pace, until 1999, when the first television was introduced, there was only one airport in the country, and even a railway was not built. For us, a mobile phone is a luxury for Bhutanese people, and less than 5% of Bhutanese people have a mobile phone. 
Although Bhutan has a low socio-economic level, the people there have a relatively high level of happiness, and the level of happiness felt by Bhutanese people is the first in Asia and the eighth in the world. Compared to the information-impetuous society we live in, Bhutanese people who return to a "primitive" state of life may be the most enjoyable to live. The reasons why Bhutan did not establish relations with China are not clear, but it is inseparable from its political and cultural influences. In the 19th century, the Qing Dynasty was reduced to a semi-colony of Western countries, and had no spare ability to shelter the remote vassal states. As a result, the weak Bhutan eventually became a British colony. Later in history, the impact of the war freed Bhutan from British control, but Bhutan was once again under the control of India, both in its own domestic affairs and in foreign affairs. As we all know, there are often frictions between China and India, and the establishment of diplomatic relations between Bhutan and China will be a long and indefinite period. 
In addition, Bhutan's land area is very small, only 1 of the area of Hainan Island in China5 times, its population size is not large. In this case, their culture is very fragile and there is a high risk of losing the purity of their original culture if they accept a foreign culture. If there is a culture shock phenomenon, Bhutan's rule will also be threatened, and the entire country could be in danger of survival. From this point of view, their closure is also understandable. Although Bhutan has not yet established diplomatic relations with China, Bhutan has expressed its desire to establish diplomatic relations with China, but due to the influence of the international environment and its domestic conditions, the time is not yet ripe for Bhutan to establish diplomatic relations with China. In line with the Chinese nation's tradition of neighborliness and friendship, even if China does not have diplomatic relations with Bhutan, it will still lend a helping hand when it needs help.