The Origin of Foreign Imperial Concubine is a topic that Professor Cai Hongsheng has devoted himself to the study of the history of Sino-Western communication for a long time. According to Yuan Gui's statistics, in the Tang Dynasty, from the seventh year of Emperor Gaozu Wude (624) to the seventh year of Daizong Dali (722), * * * paid tribute 94 times, including 8 times for Cao Guo. Especially in the first half of the eighth century, the Arab Empire continued to launch military attacks to the East, and gradually advanced to Central Asian countries, forcing them to turn to China for help. During the reign of Emperor Xuanzong of the Tang Dynasty, it accounted for more than half. In the fourth year of Tianbao (745), King Gollum of Cao paid tribute, apparently hoping to break away from the threat of Arabs and become a small country in the Tang Dynasty. In this way, it is natural to pay tribute to Hu.

Ge said: "During the Kaiyuan period in history, Jimmy gave women, Guo Kang gave women, Shiguo gave women many times, and Miguo gave women to Hu Xuan three times at a time. According to tradition, pay tribute to Hu and others.

In addition, Cao Ye was probably a slave girl who was sold by foreign countries in the Tang Dynasty, but because she was good at singing and dancing, she also became a "Hu" who was paid tribute by Cao to Tang Xuanzong. As a foreign imperial concubine favored by Emperor Xuanzong of Tang Dynasty, Cao Ye is undoubtedly a beautiful Hu Xuannv, who is likely to be taken fancy to by Emperor Xuanzong of Tang Dynasty when dancing. Anyway, although Cao Ye is also called Cao Ye Naji, not Cao Ye Nafei, I am lucky to be one of the few foreign concubines.

"As a beauty who can sing and dance, Hu Xuannv is the easiest to get close to the emperor foreign women. During the Kaiyuan period, Hu, who paid tribute to Cao, won Xuanzong's love and entered the harem because of his color art, which is the same as Yang Guifei's catering to Xuanzong's joy with' singing and dancing'. " Ge Chengyu said.