What is the name of the man who beheaded King Jinghe in his dream in The Journey to the West?

The man who beheaded in his dream was Wei Zhi, the prime minister of the Tang Dynasty.

The novel The Journey to the West records the story of Wei Zhi dreaming of beheading the dragon king. The story goes like this:

During the Zhenguan period, Chang 'an, Tang Dou suffered from drought for years, and the bare land was thousands of miles away. It was useless for the common people to beg for rain every day. The King of Jinghe made a bet with the fortune teller. The fortune teller concluded that it would rain at three o'clock the next day, three o'clock in the city and seven o'clock outside the city. King Jinghe doesn't believe it. Later, it was clearly written on the jade emperor's decree: the clouds cleared at dawn, thunder rumbled at dusk, it rained at noon and it didn't stop at noon.

In order to win the bet, he tampered with Colleen Chan privately, changing three o'clock in the city to seven o'clock and seven o'clock outside the city to three o'clock. As a result, heavy rain fell in the city, drowning many Li people, and only three points fell outside the city. The fields are still dry, the seedlings are dead and the crops are poor.

The Dragon King scattered rain at will, breaking the dogma. The Jade Emperor wanted to behead him, so he sent Wei Zhi to supervise and beheaded the old dragon at 3 noon. The day before, Lao Long asked Li Shimin to intercede for him, and Li Shimin readily agreed. The next day, Li Shimin announced Wei Zhi to North Korea and left Wei Zhi to play Go with him. It's time for execution, and Wei Zhi can't escape. Finally, he fell asleep at his desk.

Extended data:

After Wei Zheng beheaded the dragon, the ghost of the old dragon lingered, resenting Emperor Taizong for breaking his word and making trouble in the palace every day, which made Li Shimin's six gods uneasy. Knowing that the emperor was afraid, Wei Zhi sent two generals and Weichi Gong to guard the palace gate. Sure enough, the old dragon dared not come to the front door to make trouble. But a few days later, Lao Long came to the back door of the palace to get even with Li Shimin, and Wei Zhi held a sword to guard the back door for Li Shimin, so that Lao Long never dared to make trouble again.

Considering their hard work of guarding the door at night, please ask the painter to hang a portrait of Weichi Gong at the front door and a portrait at the back door. It still worked. This trick has also begun to spread among the people. Qin Qiong, Weichi Gong and Wei Zhi have become door gods, and Qin Qiong and Weichi Gong have put them on both sides and one side.

Wei Zhi, born in Xuancheng, was originally from Xiaquyang, Julu County. Politicians, thinkers, writers and historians in Sui and Tang Dynasties were called "a generation of celebrities" by later generations because of their outspoken suggestions and assistance in the great cause of "Zhenguan rule" jointly initiated by Emperor Taizong.

References:

Baidu Encyclopedia-Wei Zhi