When Li Shimin became emperor, he actively listened to the opinions of ministers, ruled the country with courtesy at home, was modest and courteous, practiced economy, advised farmers and mulberry, made the people recuperate, enriched the country and strengthened the people, and created the famous chastity rule in China history. Open up territory to the outside world, attack Jue and Xue Yantuo, conquer Gaochang, Qiuci and Tuguhun, hit Goguryeo hard, set up four towns in Anxi, and all ethnic groups lived in harmony, which was honored as Tiankhan by people of all ethnic groups, laying an important foundation for the prosperous times of Tang Dynasty 100 years.

On July 10 (May 23rd, Zhenguan) in 649 AD, Li Shimin died of illness in Hanfeng Temple at the age of 52, and he reigned for 23 years. His temple name is Taizong and he was buried in Zhaoling. Li Shimin loved literature and calligraphy, while Mo Bao was handed down from generation to generation.

Since ancient times, Li Shimin's literary martial arts have been praised and praised by people. Academic circles have positively affirmed his great talent and great contribution to the history of China. Li Shimin is an accomplished politician and strategist who played a leading role in the struggle against Sui and Tang Dynasties. The victory of Xuanwumen Revolution of Emperor Taizong objectively played a positive role in the development of social history in the early Tang Dynasty. Emperor Taizong did not discriminate against ethnic minorities. Apart from invading Turkey and using force, he mainly dealt with ethnic issues by soft political means. Proper methods and enlightened policies are conducive to national unity and national unity.