Which year did Li Chengqian establish the crown prince?

Yes, Li Chengqian was the crown prince of Emperor Taizong of the Tang Dynasty. He was the eldest son of Emperor Taizong of the Tang Dynasty, Li Shimin, and Empress Zhangsun. He was born in 619 AD. Li Chengqian was conferred the title of King Heng Shan when he was young, and after Li Shimin ascended the throne, he was made Crown Prince. He was expected and nurtured by his father and the courtiers, and was regarded as an excellent heir. However, his fate eventually led to tragedy.

Prince Li Chengqian was the eldest son of Emperor Taizong of the Tang Dynasty, Li Shimin, and Empress Zhangsun. After Emperor Taizong of the Tang Dynasty ascended the throne, he was appointed Crown Prince, but because he conspired with his brother Li Tai and others to force the abdication, he was deposed as a commoner and exiled to Qianzhou. Although Li Chengqian's position as the Crown Prince was no longer guaranteed, his younger brother, Li Tai, did not ascend to the throne as he wished. Instead, it was the ninth son of Emperor Taizong, Li Zhi, who finally ascended to the throne. Li Chengqian's epitaph recorded the incident of him being deposed because of his rebellion, reflecting the impact of this palace dispute on the fate of the relevant officials.

Yes, Li Chengqian was made Crown Prince. After Emperor Taizong Li Shimin ascended the throne, he immediately made Li Chengqian the Crown Prince and placed high hopes on him.

Yes, Li Chengqian was the eldest son of Emperor Taizong of the Tang Dynasty, Li Shimin, and was made the crown prince. He had been conferred the title of King Heng Shan when he was young, and was later made Crown Prince after Li Shi Min ascended the throne. Li Shimin had placed great expectations on him and arranged excellent teachers to teach him Confucian classics. Li Chengqian also performed well in government affairs and was given a certain responsibility. However, there was no clear answer to why Li Chengqian wanted to rebel.

Crown Prince Li Chengqian was the eldest son of Emperor Taizong of the Tang Dynasty. He was made Crown Prince at the age of eight. However, because he was worried that his position as Crown Prince would be lost, he plotted to force the palace to rebel. In the end, he failed and was deposed as a commoner and exiled to Qianzhou. Although Li Chengqian had been deposed, his rival, Li Tai, the King of Wei, had also failed to ascend to the throne and was similarly exiled. On the contrary, Emperor Taizong's ninth son, Li Zhi, eventually became emperor. Li Chengqian's epitaph may have hinted at the influence of this palace dispute on the fate of the relevant officials. Regarding Li Chengqian's specific situation, other than his conspiracy to force the palace to rebel and his deposed as a commoner, there was no more information at the moment.

There were many reasons why Li Chengqian did not want to be the Crown Prince. First, he felt that his position was threatened because his younger brother, Li Tai, had gradually gained a group of supporters. This made Li Chengqian feel uneasy about his position as Crown Prince. Secondly, Li Chengqian's expectations of Li Shimin were too high. He felt that his treatment was unfair compared to his younger brother. In addition, there were rumors that Li Shimin wanted to depose him and make another son the Crown Prince, which made Li Chengqian worried. Therefore, he decided to strike first and rebel, but he failed in the end. In short, the reason why Li Chengqian did not want to be the Crown Prince was because he was insecure about his position and was dissatisfied and worried about Li Shiming.

Li Chengqian was made Crown Prince in 626 AD.

In 626 A.D.(the ninth year of Wude), Li Shimin ascended the throne as Emperor Taizong. On the tenth month, Li Chengqian, who was only eight years old, was appointed Crown Prince. The history books recorded that Chengqian was 'intelligent,''extremely intelligent,''graceful, dignified, and filial.' Taizong liked him very much, and as the Crown Prince of the Great Tang, Li Chengqian's life of being the second most important person to tens of thousands of people began.

There were many reasons why Li Chengqian did not want to be the Crown Prince. First, he felt that his position was threatened because his younger brother, Li Tai, was conferred the title of King of Wei and gradually gained a group of supporters. This made Li Chengqian feel uneasy about his position as Crown Prince. Secondly, Li Chengqian's expectations of Li Shimin were too high. He felt that his treatment was not in line with his younger brother's. In addition, there were rumors that Li Shimin wanted to abolish his position as Crown Prince, which made Li Chengqian feel even more uneasy. Thus, in order to protect his position and power, Li Chengqian decided to rebel. However, his rebellion ultimately failed, resulting in him being deposed as the Crown Prince and exiled. As for the specific reason, the search results did not provide any more detailed information.

According to the information provided, the reason why Li Chengqian did not want to be the Crown Prince was that he had once rebelled and raised an army to force the abdication. In the end, he failed and was deposed as the Crown Prince and exiled. This action violated his father's bottom line and endangered the security and stability of the country. He attempted to assassinate his brothers and ministers, and even wanted to overthrow his father's rule and seize the throne. Hence, Li Chengqian no longer had the qualifications to become the Crown Prince.