The princesses sent out and kissed by the Tang Dynasty, basically none of them were the daughters of the emperor. That is, none of them are true princesses.
Even the famous Princess Wencheng and Princess Jincheng are not real princesses.
In historical records, Princess Wencheng was only a clan maid. However, the specific daughter of the Li surname Zongmu is not clearly stated in the history books. Since the history books do not explicitly state it, this shows that even if she is a clan daughter, her relationship with the emperor is very far.
The same goes for Princess Jincheng. Although her father was the grandson of Emperor Gaozong of Tang, li zhi, he was not close to the current emperor Li Xian. Moreover, Princess Jincheng's father was once deposed as a commoner, which shows that the identity of Princess Jincheng is not noble.
(Princess Wencheng)
Then, since the princesses sent out by the Tang Dynasty and kissed were not real princesses, did the leaders of the ethnic minorities who were sent out and kissed have no opinion?
To talk about this problem, let's first look at the leaders of those ethnic minorities, do they know that the princess given to them and their relatives is fake?
I think it must have been known. The Tang Dynasty would never hide this matter. The leaders of the ethnic minorities must have known that this way of operating in the Tang Dynasty was to first give a clan daughter to the emperor as an adopted daughter (even some clan chamberlains are not suitable for the emperor in terms of generations. For example, Princess Jincheng was Li Zhi's great-granddaughter, that is, Li Xian's niece, but Li Xian adopted her as an adopted daughter and then married her as a princess), and then she was sent out as a princess and kissed.
Although the leaders of the minority nationalities knew about this way of doing things, why did they not care about this and did not feel that they had been deceived by the emperor?
First, there may not be a suitable one among the emperor's own daughters.
When ethnic minority leaders asked the Tang Dynasty for affection, or when the Tang Dynasty wanted to marry a princess to go out and kiss, there must be a princess of the right age. But among the emperor's daughters, age and marriage may not be so suitable. Either you are still young or you are already married, neither of which is appropriate. Moreover, the number of the emperor's daughters was also limited. Some emperors, due to their limited fertility, may not have any daughters at all. There are no daughters, and if you want to be kind, you must only choose from the clan.
Therefore, in this case, the leaders of ethnic minorities actually understand it.
(Princess Jincheng)
Second, it was not necessary to ask to marry the emperor's own daughter.
Why did the ethnic minorities ask to marry the daughter of the Tang emperor? Why did the Tang emperor send princesses and relatives? In fact, it is not a question of marrying a princess in itself. That is to say, it is not how beautiful the princess looks, how the leader of the ethnic minority fell in love with the princess at first sight, it is not like this. Rather, it was between the Tang Dynasty and this minority country that it was necessary to establish political ties through this political marriage.
This political connection, in the minority countries, was to be able to be protected by the Tang Dynasty, which was able to continuously reward them with grain and silk and other items. When minority countries were invaded by other countries, or when there was turmoil in the country, the Tang Dynasty was able to lead troops to help them settle down. In the Tang Dynasty, it was hoped that these minority countries could regard them as big brothers, obey the command of the Tang Dynasty, and would not easily invade the Tang Dynasty.
Since this is the true purpose of the two countries, as long as they are close to this matter, they can achieve this goal, which is a very satisfactory thing for both countries. Why do you have to marry a real princess?
Moreover, all the clan daughters who married out had become the adopted daughters of the emperor. This is a recognition of identity. With this identity, political goals can be achieved.
(Ancient and pro scenes)
Third, not being the emperor's biological daughter was good for both sides.
Why is it good for both sides?
First, it is a political action. Since it is political action, the situation may change. That is, the two sides may be friendly at one moment and fight at the next. If it was a real princess, then the Tang Dynasty could throw a rat trap, and many military operations would hesitate. Ethnic minority countries will also have some other options because of the existence of real princesses. If it were not for the real princess, it is obvious that both sides would be much freer in political decision-making.
Secondly, if it was a real princess, the Tang Dynasty would be very uncomfortable, and the minority countries would also be very uncomfortable. Because the Tang emperor must have been reluctant to let his own daughter suffer in ethnic minority areas. Although there may be no difference in food and clothing, after all, the climate is different, and it will not be seen for many years. So the Tang emperor was reluctant. And minority leaders don't seem to want to. Because since she is a real princess, her temper will be very big and she needs to be served. How is it possible that the leaders of the minority nationalities themselves are masters and have to serve others? But if you don't serve and offend the princess, she sends a letter to the Tang Dynasty, and the Tang Dynasty may raise a teacher to ask for guilt, and contradictions will cause. In short, doing so seems to be detrimental to both sides.
Since marrying a real princess is actually not good to marry a fake princess, who will marry a real princess?
(References: Old Book of Tang, New Book of Tang)