I feel that those who draw bad men on the rivers and lakes have the strongest strength, the deepest talent and the best strategy are bad handsome. Zhu Wen, the strongest separatist warlord at that time, was finally killed by the bad handsome, and almost all three generations of kings of Liang died directly or indirectly at the hands of the bad handsome. Li Keyong, the king of Jin, was killed by the bad handsome inside before he could make moves. Li Maozhen, the king of Qi, succumbed to his arrogance. If he wants to be emperor, I don't think many people can have the strength to oppose it. Then why did the bad handsome help Li Xingyun to be the emperor? There are mainly the following reasons.

First of all: loyal to the monarch.

From his more than 200 years as a bad guy, we can see that he owes a lot to the emperor. He is still very loyal to the royal family of Li Tang, otherwise he could not have worked so long. Although he finally found an identical body double in Li Xingyun, he still didn't give up Li Xingyun, and Zhong Jun still played a decisive role.

Second: the political environment.

Although the Tang Dynasty was destroyed by Zhu Wen, there are still many people loyal to the Tang Dynasty in the world. For example, Li Keyong of Jin State and Li of Qi State have been using the titles of Tang Dynasty. Bad handsome can win the support of two people, and finally the slogan of killing Zhu Wen to help Tang helped a lot. If he proclaimed himself emperor, many people would oppose him.

Finally: appearance

The reason why the bad handsome looks like a ghost now is related to his taking the elixir. At that time, Li Shimin Taizong's prestige was very high, and he dared not take this medicine for fear of affecting his image as an emperor. Bad handsome men are even less confident to be emperors.

Based on the above three reasons, it is also helpless to support Li Xingyun's proclaimed himself.

The above is purely my personal opinion.