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.
According to the documents provided, it was impossible to determine the age at which Li Chengqian was crippled.
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.
Li Xiang was the eldest grandson of Li Shimin, Emperor Taizong of the Tang Dynasty, and Li Chengqian was Li Xiang's father. According to the records, Li Chengqian gave birth to his eldest son, Li Xiang, at the age of 11. However, the search results did not provide Li Chengqian's specific age at birth. Therefore, it was impossible to accurately answer how old Li Chengqian was when Li Xiang was born.
Li Chengqian suffered from leg problems when he was twelve and fourteen years old.
Li Chengqian was born in the first year of Zhenguan, but the given search results did not mention his age in the first year of Zhenguan. Therefore, I don't know how old he was in the first year of Zhenguan.
Chenxin was a musician in Taichang Temple in the early years of the Tang Dynasty. He was in his teens.
In the second year of Zhenguan, Li Chengqian was eight years old.
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.
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.