Emperor Taizong (Li Shimin) Tang Taizong was named Li Shimin (599-649 AD), the second son of Tang Gaozu, Li Yuan. After killing Prince Li, he forced Gaozu to give him the throne. After 23 years in office, he died of dysentery at the age of 5 1 and was buried in Zhaoling (now Jiuzong Mountain, 50 miles northeast of Liquan County, Shaanxi Province). Li Shimin, born in the 18th year of Emperor Wen of Han Dynasty (599), is the second son of Tang Gaozu Li Yuan. Li Yuan hoped that he would be a person who would help the world and people in the future, so he was named Shimin. During the reign of Yang Di in the Sui Dynasty, the anti-Sui struggle broke out one after another. In 6 17 years, when the time was ripe, Liu Wenjing and others instigated the fight against Sui and attacked Chang 'an. After the establishment of the Tang Dynasty, Li Shimin was made King of Qin and served as Minister of Books. Facing the separatist situation, he led the troops to fight in the North, and successively eliminated the separatist forces such as Xue Renguo, Liu Wuzhou, Wang and Dou Jiande, and gradually unified the whole country. He was a true pioneer of the Tang Dynasty. Not only won the world, but also recruited talents, including, Qin, Xu Shiqi, Li Jing, and 18 bachelors such as Fang and Du Ruhui. This enabled him to launch a fierce battle for the throne with Prince Li. Li has the legal status of a prince and is supported by a large number of royal families. He looked forward to being in Guanzhong, with a solid foundation in the capital Chang 'an, and even the palace guards were under his control. Gaozu likes him very much, and his favorite concubines, Zhang Jieyu and Yin Defai, are also closely related to him. Taking advantage of these advantages, he tried many times to get rid of Li Shimin in order to succeed to the throne. One night, he invited Li Shimin to drink at home and poisoned the wine. Li Shimin caught off guard, picked up the cup and drank it. Suddenly, he felt abdominal cramps. His uncle Li Shentong, the king of Huai 'an, was there and took him back to the West Palace. He vomited and vomited a lot of blood before he knew that Li had poisoned him. He quickly let the doctor take medicine and finally recovered slowly. History is called "the rule of Zhenguan". However, in his later years, Li Shimin's life tends to be luxurious again. He built many buildings, increased taxes and used the army abroad for many years. His three expeditions to Korea failed, and his desire to develop his power eastward failed to come true. In March 649, Li Shimin suffered from dysentery, and the treatment was ineffective. He ordered the prince to represent state affairs in Jinyemen. In May, critically ill, he called the prince and concubines into the bedroom, called Sun Chang Wuji and Chu Suiliang into the bedroom to accept his life, and ordered Chu Suiliang to draft a testament. Soon, the British monarch Li Shimin died in the Dafeng Hall of Chang 'an Palace.