Although Zhang Qian's two missions failed to achieve the goal of alliance, they broadened people's horizons, established extensive economic and cultural ties between the Han Dynasty and the western countries, developed exchanges between China and the West, and obtained a lot of information on social, economic and geographical exchanges between the western regions and Central Asia, which also played an important role in the development of the northwest by Emperor Wu of the Han Dynasty. This historical event is called "Zhang Qian hollowing out". Although the Silk Road had a history of hundreds of years before the Han Dynasty, Zhang Qian, as a great pioneer, played a very important role in opening up the Silk Road and developing exchanges between China and the West.

Ban Chao's thirty-year mission to the Western Regions restored the rule of the Eastern Han Dynasty and the exchanges between China and the West, which enabled the economic and cultural exchanges between the Eastern Han Dynasty and the Western Regions to continue to develop. Ban Chao went to the Western Regions, and in the 9th year of Yongyuan (97), he sent Gan Ying to Daqin. Although it didn't succeed, it contributed to the future communication between Europe and Asia. Ban Chao's great achievements will go down in history forever.

Abstract: Zhang Qian in the Western Han Dynasty was the first person to open up the road to the western regions. He sent two missions to the western regions, which promoted frequent exchanges between the western regions and the mainland. The famous commercial road in history, the Silk Road, was opened to the outside world. Ban Chao governed the western regions for 30 years in the Eastern Han Dynasty, which further promoted the development of the western regions, consolidated the reunification of the motherland, made great contributions, and was admired by future generations.