Evaluating coachable's listening to Emperor Taizong at the same time means listening to different opinions and suggestions extensively, without listening to partiality; Teachability means that the monarch accepts correct opinions and criticisms, corrects shortcomings and mistakes, and prevents political and personal mistakes. Listening to remonstrance is an important personal political accomplishment, quality and style of feudal emperors. Feudal monarchs all know that they should listen to the adjustable at the same time, but it is not easy to do this. Emperor Taizong tried to be a wise king. Wei Hui said, "You are wise because you listen to both; Everything so black is biased. " He hoped that Emperor Taizong could "let it go" and become a wise monarch. If you can listen to the advice, then "the monarch and the minister can't shelter" and "the next situation must pass." This country can be governed well. Emperor Taizong attached great importance to Wei Zhi's opinions, and listened to loyal subjects' opinions as much as possible in his own actions. The relationship between Emperor Taizong and Wei Zhi, who bluntly remonstrated, and his remonstrance attitude towards Wei Zhi proved that he was indeed a monarch who was good at coachable. Zheng Wei has the loyalty of "the shame of the monarch is not as good as Yao and Shun". During the Zhenguan period, no matter the national politics or the personal behavior of Emperor Taizong, as long as he thought it was inappropriate, he would call a spade a spade, and even if he wanted to offend Emperor Taizong, he would not give in. Emperor Taizong also believed that Wei Zhi "never allowed me to do anything wrong, so I paid great attention". Wei Zhi's remonstrance and courtiers' remonstrance became a beautiful talk about the sage of monarch and courtiers in feudal society. Emperor Taizong was known as "a wise monarch who listened to remonstrance", which was closely related to Wei Zhi's constant remonstrance. Emperor Taizong also gained great political benefits from listening to coachable. Emperor Taizong deeply realized that "the wise master thinks short and good, while the dark master protects short and is always stupid". He asked his deputies to "try their best to save me from evil." He also promised that "I will not be outspoken, but I will be angry with each other." And always listen to criticism with a pleasant countenance. In fact, Emperor Taizong not only did not blame but also rewarded officials who could speak out. For example, Zhang suggested restoring Luoyang Palace and rewarding 200 silks. Sun Jian was not punished properly, and the princess of Lan Cemetery was rewarded with a million dollars. Wei Zhi remonstrated against improper employment and rewarded 500 silks. This not only praised the courtiers who made suggestions; But also played the role of guidance and persuasion. During the Zhenguan period, under the advocacy of Emperor Taizong, admonition became a common practice. Not only ministers protest, but also the eldest grandson queen and Xu Xianfei in the palace can protest. When Wei Zhi, who was famous for his direct advice, died, Emperor Taizong was very uncomfortable. He said: "husbands can use copper as a mirror to dress up;" Taking history as a mirror, we can know the rise and fall; Take people as a mirror, you can know the gains and losses. I have kept these three mirrors in case I pass by. Now that Wei Zhi is dead, he died in a mirror. " . I cried for a long time. Emperors like Emperor Taizong who set an example and listened to the words of loyal ministers were really rare in feudal times. In order to enable future generations to listen to remonstrance and consolidate the rule of the Tang Dynasty, Emperor Taizong also made specific provisions on remonstrance and remonstrance. He stipulated that officials above the third grade should be accompanied by admonishers when deliberating, and if there are mistakes, they should be admonished. In the first year of Zhenguan, Emperor Taizong wrote that "since the Prime Minister entered the DPRK to set the country's plan, he will make the admonishers obey the people, pre-govern, and speak freely, and he will be vain." Emperor Taizong also stipulated that Beijing officials with more than five grades should take turns to stay in the palace, so that the emperor could summon them, ask questions about foreign affairs, and understand the sufferings of the people and the gains and losses of political affairs, so as to reach the next situation. Knowing people and being good at their duties are two important subjective reasons for Tang Taizong's political success, and also an important political quality for him to become an outstanding feudal politician. It can be said that the reason why Emperor Taizong can become a model of feudal emperors has a lot to do with his ability to know people and be good at their duties, to listen and to train them.