How was Li Shimin's life in his later years when he came to power through the Xuanwumen coup?

Li Shimin's health deteriorated in his later years, and his control over power gradually weakened.

It is said that in 645 AD, Li Shimin personally signed Koguryo. Although it achieved good results, it failed to destroy Koguryo. The battle lasted for a long time and soon brought down Li Shimin's body. In fact, Koguryo's trip was a watershed in Li Shimin's life, and since then, Li Shimin's political old age has followed.

After the expedition to Koguryo, he couldn't afford to get sick on his way back to Lee. Because he is so ill, he can't even move. At that time, Prince Li Zhi personally went to Dingzhou to meet Li Shimin and took carbuncle poison for him. Li Shimin was very moved. Since then, Li Shimin's health has gone from bad to worse, and Prince Li Zhi gradually stepped onto the political front and began to govern the country. Li Shimin is also a pursuer of the elixir of life. He began to take a large number of so-called panacea, and his body was even more devastated. His temper became more and more eccentric and he became very sensitive. Words, once a birthday, Li Shimin and Sun Chang Wuji had a long talk. At that time, Li Shimin actually cried in front of Sun Chang Wuji, saying that he failed to try to keep his parents' knees. What a pity. It is extremely rare for an emperor to cry in front of his courtiers.

Of course, Li Shimin inevitably became fatuous in his later years. At that time, Sean, one of the heroes of Lingyange, was directly executed by Li Shimin because he had raised 500 fake children. Although ministers advised him not to execute Sean, Li Shimin just ignored his advice and insisted on executing Sean. In addition, in his later years, Li Shimin also built large-scale buildings, which caused a heavy burden to the country. For example, Li Shimin ordered the demolition of two palaces and built two large palaces on this basis, which was a waste of human and financial resources. At that time, Xu Hui, the minister, also wrote to Li Shimin, urging him not to build. Although Li Shimin praised him, he went his own way.