The reason why Li Xiu resigned from his official position and came to Liaodong, in addition to the reason why he had promised Ma Ye to accompany him to collect the bones together, the most important reason was actually to stay away from the court, after all, he didn't like the disputes in the court, and for some reasons in the past few years, he fell into the court step by step, and now he can finally find a chance to get out.

However, there is one most important reason, this reason Li Xiu did not tell anyone, that is, because of Li Chengqian, although his resignation also has a lot to do with Li Chengqian, but that is just a fuse, the real reason is only known to Li Xiu, and he did not even tell Princess Pingyang.

At the time Li Chengqian was five or six years old, he was sent to Li Xiu by Li Shimin to study, Li Chengdao was still there at that time, and the relationship between the two brothers was still very good, every time Li Chengdao took Li Chengqian to Li Xiu together, and Li Xiu also liked Li Chengqian very much, and his education has never been relaxed, and later the Xuanwumen change still happened as in history, and Li Xiu also paid more attention to the education of Li Chengqian, hoping to reverse Li Chengqian's fate in history.

Originally, everything went very smoothly, Li Chengqian has been smart since he was a child, and his personality is also very atmospheric, and he can listen to others, at least in Li Xiu's opinion, Li Chengqian does not have the appearance of being rigid and self-serving and not listening to others in history, but he didn't expect that Li Chengqian had just become an adult, and his personality became more and more like the Li Chengqian in the original history.

Later, Li Xiu also analyzed the reasons for Li Chengqian's personality changes, and finally guessed that it was probably because Li Chengqian had a smooth life since he was a child, and he had never encountered any setbacks at all, but he had a big heel in his feelings, of course, this can't be blamed on Qi Niang, and even Qi Niang is not very sure whether Li Chengqian likes her until now?

However, Li Chengqian's emotional setback is not the main reason for the great change in his personality, it can only be said to be an inducement, what really made Li Chengqian fall is because of his position as the prince, Li Chengqian has been made a prince since he was a child, and he is a precocious child, so he also understood his responsibilities early, it can be said that he has worked hard to learn to be a qualified prince since he was a child, so that he can take over the throne and benefit the people in the future.

But later Li Chengqian because of a moment of indulgence, resulting in a leg disability, which also directly led to a change in Li Shimin's attitude, the most representative of which is that he let Li Tai live in the Wude Palace, although in the end because of the opposition of the ministers Li Tai failed to really move in, but this incident has hurt Li Chengqian's heart, after all, he has been preparing for more than ten years in order to become a qualified prince, but in the end he was abandoned by his most biological father, this blow is almost devastating for him.

In addition, the death of Empress Changsun suddenly became the last straw that broke the camel's back, and Li Chengqian's personality also began to change during that period, when Li Xiu was already aware of it, so he also tried his best to persuade him, but instead of effect, it led to the breakdown of his relationship with Li Chengqian, after destroying Goguryeo, he returned to Chang'an to see Li Chengqian, and he also wanted to make another effort, but the final result was that his relationship with Li Chengqian was completely broken.

Li Xiu is a person who has traveled through time, and he knows very well that according to Li Chengqian's current character, he will definitely be like in the original history in the end, even if Li Shimin does not kill him, it is impossible to keep the crown prince, and in the end he can only die a desolate death.

Although the relationship between Li Xiu and Li Chengqian broke down, the other party was his student after all, and Li Xiu couldn't bear to watch Li Chengqian step by step into the abyss, wanting to help him, but the other party was still ruthless, which made Li Xiu also very sad, so he simply resigned, so that out of sight and out of mind, in addition, if Li Chengqian really embarked on the old road of history in the future, he would not be involved in him.

Originally, Li Xiu resigned and went to Liaodong, and the power core of the Tang Dynasty was completely cut off, at least for a short time, he felt that there would not be anything in the court to bother him, but it was a coincidence that the imperial court had divided the Goguryeo territory into the Andong Protectorate, and began to send officials, Xincheng also sent some officials over, I heard that Li Xiu was here, so he came to visit, and by the way, he also brought some news of Chang'an City.

Among these news, one of the news is about Li Chengqian, that is, Yu Zhining, Li Baiyao, Du Zhenglun, and Kong Yingda were appointed as auxiliary ministers of the East Palace, and Liu Xun, Cen Wenwen, and Ma Yiren took turns to come to the East Palace to discuss with Li Chengqian about learning and the way of government.

On the surface, it is very normal for Li Shimin to send some ministers to teach Li Chengqian, but Li Xiu sighed secretly after hearing the news, because he knew that it must be Li Shimin who also discovered that Li Chengqian's character was wrong, so he sent so many important ministers to teach Li Chengqian, not to mention anything else, just Cen Wenwen and Ma Zhou, both of whom are in the limelight in the court, are now in the position of deputy prime minister, and they may ascend to the prime minister at any time, as for Kong Yingda and Yu Zhining and others, they are also erudite Confucians, It is very difficult for ordinary people to go to their school.

It is estimated that in Li Shimin's view, the erudite Confucians sent to Yu Zhining, plus Cen Wenwen, these capable ministers, will definitely be able to educate Li Chengqian, but Li Xiu is not optimistic about this matter, because he remembers that in the original history, Li Shimin had also done the same thing, hoping to educate Li Chengqian, whose personality was becoming more and more extreme.

However, what Li Shimin never expected was that Yu Zhining, these ministers, were very dedicated, and when they encountered Li Chengqian's mistakes, they also had the courage to correct them, but it was precisely because these people were too conscientious that no matter what Li Chengqian did, they could find some faults, and every time they would write a large paragraph of advice to Li Chengqian, and each one was more fierce than the other, as a result, Li Chengqian was young and vigorous, not only did not listen to these people's advice, but also worked against these people, and as a result, his words and deeds became more and more absurd.

It is precisely because of Li Shimin's improper selection of people and wrong education methods that Li Chengqian's personality is becoming more and more distorted, and Li Shimin also began to be disappointed in Li Chengqian, so he transferred his feelings to Li Tai, and finally caused Li Chengqian to break the jar and plot to rebel, but unfortunately before he could do it, he was discovered by Li Shimin.

Thinking of the tragedy of Li Chengqian's life in history, Li Xiu couldn't help but sigh, although he really wanted to help Li Chengqian get rid of his tragic fate, but now it seems that Li Chengqian's tragedy is doomed, and it can't be changed by manpower, even himself, which makes Li Xiu feel very powerless.