Why is there a "zero admission" in the imperial examination in history?

The "zero admission" in history is because Tang Xuanzong trusted Li and was deceived by him. Generally speaking, Li disturbed his hearing and hearing with slanderous remarks before the imperial examination, so that he ordered people to choose first, and Li took the opportunity to eliminate talents, resulting in no one taking the imperial examination.

In history, the event of "zero admission" occurred in Tianbao period of Xuanzong of Tang Dynasty. In Tang Xuanzong's later years, he realized that the world was peaceful, so he stopped being diligent in state affairs and concentrated on enjoying life. He often lived in seclusion and didn't care about North Korea's affairs, so Li managed a "foreign dynasty" for him.

And Li, a vicious man, is a typical "duplicity" generation. He has little knowledge and often jokes about typos, and is laughed at by the whole world. In the sixth year of Tianbao, Emperor Xuanzong of the Tang Dynasty felt that it was time to recruit talents and scholars for the court, so he sent a letter to the court to recruit scholars. This is a good thing for the country and the people, but Li is not happy.

Of course, Li is very dissatisfied with it. He can't stand people who think highly of themselves. He finally drove away a group of old people and came to a group of new people. Where can he stand it? So he went to Tang Xuanzong and said, "Now people who take the imperial examinations are very modest and ignorant. What they say is vulgar and ugly. They all call names for fear of polluting the emperor's ears. The emperor hasn't held the imperial examination yet. "

Although Emperor Xuanzong of the Tang Dynasty felt that Li's words were exaggerated, he also felt that there was something wrong with what Li said. He is lucky to have an imperial examination. Why does he listen to dirty words? What if there is a vulgar example? Therefore, Tang Xuanzong changed his mind and asked officials from all sides to arrange candidates for the exam first.

The original intention of Emperor Xuanzong of the Tang Dynasty was to screen out some vulgar activities, while Li took the opportunity to crowd out Zhang Jiuling, Yan Tingzhi and what a group of talents. Finally, all the students in Shangshu Province who took the imperial examination failed in Sun Shan, and then staged the famous scene of "zero admission" in the imperial examination in history.