That was the Tang Dynasty, not the Han Dynasty. Black figurines of the Tang Dynasty have been unearthed in many places in China. The black figurines of Tang Dynasty unearthed in Xi 'an in the 1940s attracted wide attention in academic circles, and then the black figurines of Tang Dynasty were discovered continuously. In order to find out the origin of men in black in Tang Dynasty, Professor Ge searched all kinds of historical materials and carefully identified them in several historical museums and cultural relics warehouses in An, where there were the most men in black in Tang Dynasty. After discussion and consultation with his peers, he put forward a new explanation, that is, the origin of blacks in the Tang Dynasty was not Africa, but Southeast Asia and South Asia. This paper was published in the recently published academic journals of China Literature and History.

Ge Yongcheng carefully analyzed the differences between African blacks and Nanhai blacks. Although they are all from black curls, they look different. Black people in the South China Sea, known as "Kunlun slaves", are not Negro people in Africa, but should be entrusted by nigri people, also known as short black people. Until now, these tribes and races similar to African blacks are still scattered on the islands south of the Malay Peninsula.

Why did black people come to China at that time? Professor Ge said that one was sent to Chang 'an, the capital of China, as an annual tribute, the other was plundered and sold to the coast or inland as an indigenous "barbarian ghost", and the other was left by envoys from Southeast Asia or South Asia who entered China.