Why was Li Chengqian’s position as crown prince abolished

Before uncovering this answer, let’s first learn about Li Chengqian! Interested readers and history encyclopedia editors, let’s take a look together!
Li Chengqian was the eldest son of Emperor Taizong of Tang, born in 619 AD. His mother was Empress Wende Changsun!
Because Li Chengqian was born in the Chengqian Hall, he was named Li Chengqian. However, there is also a saying that Li Chengqian’s name was given by Li Yuan! It means inheriting the imperial legacy and leading the universe!
When Li Chengqian was 8 years old, he was appointed as the Crown Prince by Li Shimin. During this period, in order to cultivate him, Li Shimin first invited ministers such as Wei Zheng and Fang Xuanling to assist him, and then sent him to the Six Ministries for litigation, entrusting him with the power of making arbitrary decisions! Therefore, under the special care of Li Shimin, Li Chengqian was soon appointed as the regent and became a true heir to the throne!
However, as Li Chengqian grew older, he also began to become absurd and rebellious, until he was deposed from the position of crown prince by Li Shimin!
What kind of absurdity did Li Chengqian become to end up like this?
Firstly, I enjoy favoring male pets!
Li Chengqian has a special hobby of favoring male pets!
Once, Li Shimin learned that Li Chengqian had an external interest in a Tai Changle personality who was “beautiful and skilled in singing and dancing”, and he felt dissatisfied! Therefore, he soon gave up this male pet!
After learning about it, the Crown Prince was very sad in his heart. As a result, he did not attend court for several months in a row and even set up a mourning hall at home, allowing the people in the mansion to pay tribute every day to show their grief! What’s even more outrageous is that Li Chengqian even erected a chamber and a monument for this male pet! Grant him an official position to compensate for this male pet!
Secondly, personal connections with Turkic people! Intentionally sprinkle salt on Li Shimin’s wound
In 641 AD, while Li Shimin was carefully selecting teachers to assist the Eastern Palace, Li Chengqian got into a fight with the Turks. He not only left the palace to drink with the Turks without permission, but also invited them to visit the palace! This made Li Shimin very dissatisfied. Therefore, Li Shimin once secretly told Li Chengqian’s teacher Du Zhenglun to advise the Crown Prince not to act so recklessly again. However, although Li Chengqian appeared obedient on the surface, he was still secretly colluding with these people! I don’t take Li Shimin’s words seriously at all!
You should know that the Turkic people once forced Li Shimin to sign the Wei River Alliance. Now, his beloved son has become one with the Turkic people, like brothers. For Li Shimin, this is like sprinkling salt on his wounds, and the pain is unbearable! But Li Chengqian pretended not to know about these!
Thirdly, assassinating brother Li Tai and wanting to bring another Xuanwu Gate Incident to Li Shimin
Li Tai, the King of Wei, was the mother and younger brother of Li Chengqian. Once, Li Tai’s edited book “Kuadi Zhi” was completed and deeply loved by Li Shimin. Therefore, Li Shimin not only stored the book in the royal library, but also generously rewarded Li Tai one after another – first giving him “ten thousand pieces of goods”, and then giving him a large amount of wealth every month, even exceeding the specifications of the Crown Prince! Therefore, it caused extreme dissatisfaction among Li Chengqian!
In 642 AD, Li Chengqian suspected that Li Shimin intended to make Li Tai the crown prince, so he wanted to take action to forcefully eliminate Li Tai. However, due to the failed assassination attempt and the inability to reverse Li Shimin’s fate of making Li Tai succeed, Li Chengqian decided to use Li Yuanchang, Princess Chengyang’s son-in-law Du He, Hou Junji, and others to bring about a Xuanwu Gate coup for Li Shimin! Resulting in a major defeat! In the end, due to this matter, Li Shimin had to abolish Li Chengqian and imprison him in Qianzhou until his death!