Li Er is still very satisfied with Li Chengqian's destruction of Xue Yantuo, which is enough to prove that he still has a vision as a prince.

"Now that Xue Yantuo is gone, how did you deal with Mobei?" Li Er asked.

Li Er wanted to see how Li Chengqian handled the relationship between the Han people and other ethnic groups, which was related to the future of the Tang Dynasty.

"Xue Yantuo and the others, as well as the Uighurs, Servants, Tongluo and other tribes have all asked to submit to my Great Tang, and I have granted their request!"

"Dumozhi even followed me to Chang'an in person, and Dumozhi is also the last Khan of Xue Yantuo, I don't dare to arrange it at will."

"Then he was placed in the post house, and someone was sent to take care of him, and what should be done with the Romans still needs to be dealt with by his father." Li Chengqian said.

Li Er nodded, and he still approved of Li Chengqian's doing.

"What would you do if you were asked to dispose of Omochi?" Li Er asked.

Test me again! Li Chengqian secretly said in his heart: After the surrender of the historical Lama Branch, when he came to Chang'an, Li Er gave Lama Zhi a position as a general.

"I think I can leave Ruma Zhi in Chang'an and arrange an official position for him, so that I can not only monitor Ruma Branch, but also use it for my Datang."

"With the presence of the last Khan of the Xueyanta Khanate, we don't have to worry about the return of those thieves who are not dead. Flash"

"It can also show my Tang Dynasty, as the bearing of the Heavenly Empire, I can get more in one fell swoop, why not do it." Li Chengqian made his own suggestion.

"You're right! Leaving Uma Zhi can not only show the bearing of the Tang Dynasty, but also appease the people of Xue Yantuo, then appoint Lama Zhi as the general of the Right Guard, and this matter will be handled by you. Li Er said.

"Yes! Sons obey! Li Chengqian said: "Erchen has a sentence that I don't know whether to say or not!" ”

"Whatever you say, even if you say something wrong, I won't blame you, the reason why I appointed Wei Zheng in the first place was not to value him for being outspoken and daring to risk the world's condemnation." Li Er said.

"Father, although we have eliminated Xue Yantuo and the nine clans of Mobei Tiele have returned to the Tang Dynasty, I am worried that among these people, it is difficult to guarantee that there will be no more forces like Xiang Xue Yantuo."

"Eliminate this today, and that one the day after tomorrow, why can't we completely solve them once and for all?" Li Chengqian asked.

As the so-called non-own race, their hearts will be different! These tribes are submissive to the Tang Dynasty because the Tang Dynasty is strong, and they are now weak and may not be truly obedient.

Maybe one day, after they become strong, maybe he will also want to become the second Xue Yantuo.

Thinking of this, Li Chengqian couldn't help but think of Silla, a small country living on the peninsula, isn't that what it is!

There were three small states on the peninsula, and Silla could not do the other two, so he thought of his neighbor, the powerful Tang Dynasty. 35xs

With the help of the strength of the Tang Dynasty, Silla completed the unification of the peninsula, but it also drove the Tang army out of the peninsula and took the fruits of the Tang army's defeat as its own.

In the end, although he still submitted to the Tang Dynasty and recognized the status of the Tang Dynasty's suzerain, it is also an indisputable fact that Silla rebelled against the Tang Dynasty.

It's just that even if Silla unifies the peninsula, it can't be compared with Xue Yantuo, otherwise, it is still two to say whether Silla will resubmit to the Tang Dynasty.

"War does not solve everything, force can only deter the other party and make them submit to the force of my Datang, but this is only a symptom and not a cure."

"At present, there are still many enemies of the Tang Dynasty, especially Tubo, don't look at the current Tubo and Datang seem to be in harmony."

"But the ambition of Tibet's outward expansion still exists, and sooner or later there will be a war between the Tang Dynasty and Tibet."

"Only by subduing people's hearts can we achieve long-term peace and stability, I treat each other with sincerity, and there will always be people who sincerely surrender to Datang."

"As long as my Datang continues to maintain a strong national strength, we will be able to deter Xiaoxiao, and if there are Yi people loyal to Datang to monitor for us, the border of Datang will always be peaceful." Li Er explained to Li Chengqian.

This was the Tang Dynasty's adoption of a political policy toward ethnic minorities in the southwest, a system called the Bondage System.

The Tang Dynasty recognized the local indigenous aristocracy, made them princes, and incorporated them into the imperial court management system.

The word "bondage" means to use a network made of leather to tie the horse, and the meaning of 縻 is to tie, tie, and bondage, which is literally understood as a restraint and does not make it raw.

In layman's terms, it is to tie these Yi tribes like horses with the reins, firmly control them in their hands, and prevent the horses from escaping.

On the one hand, military power and political pressure are used to control these foreigners.

On the other hand, economic and material benefits were used to appease foreigners.

In the Song, Yuan, Ming, and Qing dynasties, such a fetters system was called the Tusi system.

The fetters system originated in the Tang and Song dynasties, and the Yuan Dynasty perfected the Tusi system, which reached its peak in the Ming Dynasty and began to collapse in the middle and late periods, and it was not until the Yongzheng period of the Qing Dynasty that the land reform was returned.

In this way, the fetters disappeared into the river of history.

This is also the Tang Dynasty's ability to firmly control the surrounding ethnic groups, and it is an indispensable part of the prosperity of the Tang Dynasty.

"Erchen understands!" Li Chengqian said.

"If only you could understand! After all, there are many tribes around Datang, and not everyone is full of hostility to my Datang, and we must use force to eliminate those who want to fight against Datang. ”

"Use the fetters system to appease the Yi people who are willing to submit to the Tang Dynasty, no matter what, my Datang has a limited population, and it is unwise to blindly use force to conquer the surrounding peoples."

"No matter how solid the family foundation is, there will be a time when it will be lost, so we need to guard the border for us by subjugating the surrounding peoples." Li Er earnestly taught.

"Sons remember the teachings of their father, father, Uighurs, servants and other tribes want to come to Chang'an to meet their father, and the sons have allowed them to come to Chang'an, and they will arrive in Chang'an soon."

"Without the permission of his father, the son made the decision to allow these tribes to come to see his father, and asked his father to punish him." Li Chengqian stood up and saluted.

"This is just a trivial matter, if you are right, you will be sure, you have even destroyed Xue Yantuo, and you still care about this." Li Er patted the position next to him and motioned for Li Chengqian to sit down and said.

Li Chengqian sat down again, Li Er's reaction was as he expected, he was just pretentious just now, to see if Li Er was as he thought.

Li Erping withdrew from everything and made room for his father and son to say something close to him.

Li Er said that he first affirmed Li Chengqian's performance during this period of time, and praised him for becoming more and more mature, but he was a little aggressive, and he should be more stable.

Li Chengqian quietly listened to his father's earnest teachings! Respond a few times from time to time.

The father and son chatted until late at night, and Li Er let Li Chengqian leave his dormitory, the Ganlu Palace.