Li Chengqian rebelled in the 17th year of Zhenguan (AD 643), when he was already an adult. However, his exact age was not mentioned, so it was impossible to determine his age at that time.

There were many reasons for Li Chengqian's rebellion. On the surface, his dissatisfaction and fear towards Li Shi Min was the direct reason. He was dissatisfied with Li Shiming for executing his pet boy and others, and also dissatisfied with Li Shiming's teachings and discipline. He was afraid that Li Shi Min would depose him or let his brother Li Tai inherit the throne. He was also afraid that Li Shiming would discover his misdeeds or expose his rebellion plan. However, from a deeper perspective, the root cause of Li Chengqian's rebellion was the change in his personality and psychology. He had changed from a clever, cute, filial, and understanding Crown Prince to a dissolute, wanton, and delusional traitor. There were several reasons for this change: the position of Crown Prince was too early. Li Chengqian was made Crown Prince at the age of eight and enjoyed supreme glory and power. In addition, his psychological perversion and inferiority complex were also one of the reasons for his rebellion. The tension between his brothers, especially his sense of threat to his younger brother Li Tai, was also one of the reasons for his rebellion. In general, there were many reasons for Li Chengqian's rebellion. There were external dissatisfaction and fear, as well as internal personality and psychological changes.
Prince Li Chengqian plotted a rebellion in the 17th year of Zhenguan, but it ultimately failed. He was deposed as a commoner and exiled to Qianzhou. His rebellion was probably because he was worried that he would not be able to become emperor, and this was also considered a typical case of failure in the education of ancient princes. Li Chengqian's rebellion had an impact on the fate of the officials involved. One of them was exiled and the other was killed. Although Li Chengqian had been deposed, his rival, the King of Wei, Li Tai, did not ascend to the throne as he had wished. Instead, it was Li Taizong's ninth son, Li Zhi, who eventually became emperor. As for the specific reasons and details of Crown Prince Li Chengqian's rebellion, there was no detailed information in the search results provided so far.
Li Chengqian's accomplices included Han King Li Yuanchang, Princess Chengyang's son-in-law Du He, Hou Junji, Li Anyan, Zhao Jie, and others.
There were many reasons for Li Chengqian's rebellion, the most important of which was his dissatisfaction with his father, Li Shimin, and the deteriorating father-son relationship. Li Chengqian had once favored a person from Tai Chang Le and was known as " Cheng Xin ", but Li Shimin was furious and executed him after learning about it. This incident made Li Chengqian very sad and angry. He set up a monument for his male pet and often cried for him. In addition, Li Chengqian also felt the pressure and threat from his father's strict control over him and his preference for his younger brother, Li Tai. These reasons led to Li Chengqian's final decision to rebel.
There were many reasons for Li Chengqian's rebellion. First of all, he was strictly controlled and pressured by his father, Li Shiming. Li Shimin hoped that Li Chengqian could become a wise ruler, so he was very strict with his education. Secondly, Li Chengqian liked a person from Tai Chang Le, known as Cheng Xin, and had an improper relationship with him. When Li Shimin found out, he was very angry and ordered Chenxin to be executed. This matter made Li Chengqian very sad and angry, causing his relationship with his father to deteriorate. In addition, Li Chengqian also felt that his position as Crown Prince was unstable because his younger brother, Li Tai, was outstanding and was valued by his father. These reasons added together eventually led to Li Chengqian's decision to rebel. Regarding the outcome of Li Chengqian's rebellion, there was no clear answer in the information given.
According to the documents provided, it was impossible to determine the age at which Li Chengqian was crippled.
According to the documents provided, Li Chengqian was deposed as the Crown Prince in the 17th year of Zhenguan. However, no specific age information was provided, so it was impossible to determine the age at which Li Chengqian was crippled.
" Reborn 8-year-old Prince Li Chengqian " was a time-travel novel. The main character was Li Chengqian and Little Cui. The story was about Li Chengqian transmigrating to the Great Tang and becoming Li Shimin's eldest son, the Crown Prince, Li Chengqian. Even though he was destined to become the Crown Prince, he took risks along the way. This novel was written by the author, your Grandpa Meow. It was a fascinating work.
Li Xiaochang's rebellion took place in December of the first year of Zhenguan (627). Li Xiaochang was originally granted the title of Prince of Yi 'an by virtue of his contribution to Yongfeng granary and his identity as a relative of the Li family. However, after Emperor Taizong ascended the throne, in order to reduce the burden on the people, he decided to demote the titles of kings whose treatment exceeded their contributions. Li Xiaochang was one of the demoted kings. At that time, Li Xiaochang, the governor of Lizhou (now Guangyuan, Sichuan Province), joined forces with Liu Deyu, the general of the right military guard, Yuan Hongshan, the general of the left prison gate, Zhangsun Anye, the governor of Huazhou, Du Caicai, etc. to rebel, but this rebellion was easily put down by Emperor Taizong of Tang Dynasty, and Li Xiaochang was executed for it. While waiting for the TV series, you can also click on the link below to read the classic original work of "Dafeng Nightwatchman"!
According to the search results provided, there was no mention of Li Chengqian's lifespan or age. Therefore, I don't know how old Li Chengqian is.