Zhang Da was annoyed and angry, and decided to punish Li Yuanji, arranging such a small number of soldiers, almost saving his life, it was too much, so he simply served as a guide for Liu Wuzhou, conquered Yuci County, and forced the annexation of the state.

Li Yuanji, who usually shows off his martial arts, knew that he was scared at this time, and in order to save his life, his eyes rolled and he thought of a bad idea, that is, Sima Liu Dewei who deceived him.

Li Yuanji said solemnly to Liu Dewei: "You take the old and infirm personnel to defend the city, and I will take the strong soldiers out of the city to fight." ”

- Such tragic words, when Liu Dewei heard it, it is estimated that the tears of emotion rolled down to the placket like beads.

Li Yunji took advantage of the opportunity for the troops to go out of the city at night, he took his wife and concubine, abandoned the army, and fled back to his father Li Yuan's new nest - Chang'an.

Naturally, the state soon fell.

What is the end of Liu Dewei, who was deeply deceived by Li Yuanji, there is no record in the history books, if he was not killed by Liu Wuzhou at that time, fortunately alive, knowing that he was played by a child, this deception will definitely become a shadow for his life, and he will not dare to trust anyone again. This is called being bitten by a snake for one year, and being afraid of grass ropes for three years.

Tang Gaozu Li Yuan saw his beloved son Li Yuanji who helped him guard the nest and fled back to Chang'an with his tail between his legs, the nest was occupied by Liu Wuzhou, and he was almost torn apart, and slaughtered the little rabbit cub to relieve his anger, but thinking that he was his own flesh and blood, how could he not bear to be killed, since ancient history, there have been many people who have killed their fathers because of interests, but there are almost no fathers who killed their sons for benefits. But at this moment, if he didn't kill someone, the sullenness in Li Yuan's heart would rise to the point that his whole person would explode.

So, Tang Gaozong Li Yuan said angrily to Li Gang, the secretary of the ministry: "My son Yuanji is still young and is not familiar with military and political affairs, so I sent Dou Dan and Yu Wenxin to assist him. He was given tens of thousands of strong men and horses, and the advance of military rations could be eaten for ten years, and I raised the banner of righteousness to order the origin of the world, and in the blink of an eye, they defeated me. I'm going to kill Yu Wenxin because he failed me. ”

Li Gang paused and said, "Your Majesty's beloved son can come back alive, thanks to Yu Wenxin, he can be regarded as meritorious." ”

Li Yuan cast a puzzled look at him......

Li Gang continued: "Your Majesty's beloved son, King Qi, is young, and he has done a lot of arrogant and indulgent things unscrupulously, and the people around him have plundered the property of the people, and he has allowed them to act at will and never stopped them. Dou Dan turned a blind eye to the root cause, which is Dou Dan's guilt. King Qi's mistakes, Yu Wenxin has all been played to His Majesty, otherwise I wouldn't know what King Qi did in Taiyuan. Yu Wenxin didn't tell the truth because you are father and son, he was loyal to His Majesty, so he told the truth. Now that His Majesty wants to pursue him, he will not be convinced, and others will also think that if you tell the truth to Your Majesty, you will suffer and stay away from Your Majesty, so please Your Majesty must think twice. ”

Li Yuan thought about it for a night, and he was still sober-minded, knowing that it was his son who was not angry, which led to this heart-wrenching situation, and he couldn't blame anyone, so he summoned Li Gang the next day to show his attitude, accept his advice, and not put the blame on Yu Wenxin, but to find a way to recover the lost land, which is what a doer should do.