In the ninth year of Wude (July 2, 626), he launched the Xuanwumen Rebellion, killed Prince Li, Li Yuanji, King of Qi, and made him a prince. Tang Gaozu Tang Gaozu abdicated, officially acceded to the throne, the title of Zhenguan.
Zhenguan rule was the ruling situation of political clarity, economic recovery and cultural prosperity in the early years of Emperor Taizong. Emperor Taizong inherited Tang Gaozu's national policy of respecting ancestors and worshipping Taoism, and further developed it, ruling the country and leveling the world with Taoist thought. Emperor Taizong is honest and can make good use of people.
Speak freely, respect life, exercise self-restraint, and be open-minded to teach; And adopted policies such as taking agriculture as the foundation, practicing economy, recuperating, reviving culture and education, and perfecting the imperial examination system to stabilize the society; And vigorously pacify foreign aggression, respect border ethnic customs, stabilize the border areas, and finally achieve the ideal situation of governing the world. Because the year number at that time was "Zhenguan" (627-649), it was called "Zhenguanzhi" in history.
Extended data:
After the change of Xuanwu Gate:
On June 2nd, 626, he led Wuji, Weichi Gong, Hou, Zhang, Liu Shili, Gong Sunwuda, Du Guyanyun, Du Junchuo, Zheng Rentai and Li Mengchang (Wuji, Weichi Gong, Fang, Du Ruhui, Yu, Gao Shilian, Hou Jijun and Cheng Zhijie).
Uninformed Li and Li Yuanji also entered the DPRK together and rode to Xuanwu Gate. At this point, the high-impedance has summoned Pei Ji, Xiao Yu, Chen, Feng Deyi, Pei Ju and others to prepare for inspection.
Li and Li Yuanji came to the temple by the lake. Sensing the change, they immediately turned their heads and prepared to return to the East Palace and Qi Wangmi. Li Shimin called them after, Li Yuanji is guilty. He first drew his bow and shot an arrow at Li Shimin, but because of his panic, he pulled his bow two or three times in a row, but it didn't fill up and the arrow didn't hit. Picked up the bow and shot at Li, killing Li.
Weichi Gong led seventy cavalry arrived one after another. Soldiers around him hit Li Yuanji with arrows, and Li Yuanji fell off his horse. But at this moment, Li Shimin's mount was frightened, and he and Li Shimin ran into the forest next to Xuanwu Gate. Li Shimin was caught by a branch in the forest, fell off his horse and fell to the ground, unable to get up for a while.
Li Yuanji arrived soon, grabbed the bow and prepared to strangle Li Shimin. At this moment, Weichi Gong came running and stopped him loudly. Li Yuanji knew that he was no match for him, so he quickly let go of Li Shimin and tried to run into the Wude Hall to seek his father's protection, but Weichi Gong quickly walked up to him and shot him.
When Prince Li's subordinate, General Yiwei Motorcycle, learned that he was dead, he sighed, "Can you benefit before the death of the Prince? When the Prince dies, he can escape the disaster!" So, he and his deputy guards, Xie Congdong and Qi took two thousand elite soldiers and horses and rushed to Xuanwu Gate to prepare revenge for the prince and the king of Qi.
Zhang has strong arm strength. He shut the door alone, blocking Li Feng and others. Li Feng and others can't enter. General Yun Hui and Jing Hongjun, who are in charge of security, are stationed in Xuanwu Gate. He stood up and prepared for war. People close to him stopped him and said, "It's not too late to wait for the troops to gather in formation and then slowly observe the development and changes of the situation." Jing didn't listen, so he and the corps commander Lu shouted and rushed to the enemy line, all of whom were killed.
The soldiers guarding Xuanwu Gate had a long struggle with Xue Wanche and others. Xue Wanche beat drums and shouted, ready to attack Qin Gong. The soldiers were very scared. At this point, Weichi Gong showed people the heads of the Yuanhe pole. The military forces of the Eastern Palace and Qi lost confidence and quickly disintegrated, and fled with dozens of cavalry.
After killing Jing, Li Feng said to his men, "This can also repay the womb a little." So he threw away his weapon and ran away. At this point, the coup ended with the victory of Li Shimin, king of Qin.
Baidu Encyclopedia-Li Shimin
Baidu Encyclopedia-The Rule of Zhenguan
Baidu Encyclopedia-The Change of Xuanwu Gate