When Li was alive, he was the backbone of the whole family, which was incomparable. For example, in the great cause of 13, Tujue suddenly colluded with Tang Gaozu in the dark. At this time, he always persuaded Tang Gaozu to raise the flag to rebel. At the same time, others tried to persuade, but insisted on waiting for Li to come back and asking for Li's advice. Finally, I got Li's affirmation and decided to go to war. So it can be seen that Li, as the eldest son, has enough prestige at home, and even listens to his son's opinions, so he likes Li very much.
After Tang Gaozu fought against the Sui Dynasty, he divided the army into three parts and became the commander in chief himself. At that time, Li was a leftist leader, not a rightist leader. But in fact, Tang Gaozu is just a famous leader. It was his own son who really took part in the war, and Li's position at this time was even higher than that, so the troops in the Tang Dynasty were basically in Li's hands. You can see that you trust Lee very much.
Moreover, according to historical records, Li is very kind and often eats and lives with soldiers, so he won the hearts of soldiers. Many writers in the Tang Dynasty praised Li, and even some ministers who later assisted him were Li's aides. Because Li was very kind, he didn't listen to Li Yuanji's advice and started fighting ahead of time. As a result, he was finally killed by Li Shimin in Xuanwu Gate.