Ancient foreign peace, has always been married women, why did not the emperor marry the hu people princess?

This question first of all I feel is impossible because our emperor married a hu people princess then it is to recognize the hunun single for our emperor's father, so this is simply impossible, before in our country are through the princess and foreign marriage, the emperor never had.

Then the question arises . Throughout our history, marriages to outside forces seem to have been formed through marriages to royal women. Some of the more famous of these are Wang Zhaojun and Princess Wencheng, while there are very few cases of Middle Kingdom emperors marrying nomadic princesses, which I'll bring you up to speed on below.

The first thing this shows is our traditional culture. In our Chinese culture, a son-in-law is considered half a son. If the Han emperor married the daughter of Xiong Nu Shan Yu, it would simply be recognizing Xiong Nu Shan Yu as his father, which is impossible.Therefore, for a long time, ancient emperors would not marry Hu consorts. Even if the emperor wanted to marry, the ministers would not allow it. Except for the emperor, others would not, and of course, the requirements of others were certainly not as strict as those of the emperor. Historically, there were many famous ministers in ancient China who married Hu women.

Take the Han Dynasty as an example. For example, Zhang Qian, who went on a mission to the West, was first captured by the Huns through the Hexi Corridor. This detention lasted ten years. During the ten years of Xiongnu, Zhang Qian married a Xiongnu woman and had a child. Eventually, he brought his wife back to the Han Dynasty. Li Ling and Lu Wei, who surrendered to the Huns, also married Hun women. However, in the following five years, this taboo was broken a lot. The highest military group of the Central Plains and the highest military group of the Hu Xianbei formed marriages. For example, the emperors of the Sui and Tang dynasties, whose ancestors and mothers were Hu, were no lack of headaches for Li Shimin.