Zhang Qian was a person in the period of Emperor Wu of the Western Han Dynasty, 139 BC, Zhang Qian was recruited to go on a mission to the Dayuezhi. He went through a lot of hardships. After being captured and escaping from all sorts of trials and tribulations, he finally arrived at the Dayuezhi. But the union of the Dayuezhi together against the Xiongnu did not materialize , but along the way through the Daxia (present-day Afghanistan), Shache, ütepan, Shanshan and so on. It traveled all over the north and south of Tianshan Mountain and all over Central and West Asia. Before and after 13 years. Two years later, Emperor Wu ordered Zhang Qian to make his second mission to the Western Regions, and Dawan, Usun, Kang Guo, Dayuezhi, Anshi, Body Poison, ü-Tep and other countries to start diplomatic and trade activities, the furthest emissary to the Roman Empire and North Africa. Thus Zhang Qian opened up the Silk Road, and for more than two thousand years, people continued to interact and integrate on this road. More than a thousand years later, in 1271, Italian Venetian Marco Polo and his father, uncle, etc. with the Pope's letters and business goods to China, along the way. After being captured and other difficulties and dangers through the Iranian desert, the Pamir Plateau, into the Xinjiang region of China: Kashgar, Hotan, Taklamakan Desert, arriving in Dunhuang, Yumen Pass, through the Hexi Corridor, to the Yuan Shangdu. Marco Polo stayed in China for more than ten years, after returning to China, he put what he saw and heard in China, wrote the "Travels of Marco Polo", for the first time for the West to understand the recognition of the great powers of the East. Greatly promote the trade between countries. Time is too late, stop there.