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.
Li Chengqian suffered from leg problems when he was twelve and fourteen years old.
Li Chengqian lived to the age of 27 and died in 645 AD.
There was no clear record of how old Li Chengqian was when he became a cripple. The history books only mentioned that Li Chengqian suffered from leg problems at the age of twelve and fourteen, but did not specify what caused it. Later generations had several speculations about his lame leg. One thought it was hereditary because Li Chengqian's father, Emperor Taizong of the Tang Dynasty, and Empress Zhangsun also had leg problems. The other thought it was caused by his riding injury when he was young. However, these were just guesses. There was no conclusive evidence to prove the specific cause of Li Chengqian's leg. Therefore, there was no definite answer to the question of when Li Chengqian was crippled.
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 was made prince at the age of eight.
Li Chengqian was made prince at the age of eight.
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.
Li Chengqian fell ill at the age of twelve and fourteen and broke his leg.
Li Chengqian was made prince at the age of eight.