In fact, there are many fictional versions of Kevin·Z killing dragons in history. Even in The Journey to the West, the description of slaying the dragon king was based on this story at first. According to legend, during the Zhenguan period, the Tang Dynasty suffered from drought for years, which was thousands of miles away. The people are praying for it to rain quickly, otherwise it's really useless and they can't live. Faced with this problem, a fairy teacher decided that it would rain at three o'clock in the city and seven o'clock outside the city the next day.
According to legend, it was learned by Jinjiao Laolong, who was in charge of rainfall. In order to defeat Shi Xian's spirit, Jinjiao Laolong changed the number of rainfall points predicted by Shi Xian, making it rain at seven o'clock in the city and three o'clock outside the city. As a result, it rained cats and dogs in the city, and it rained in Mao Mao outside the city. For people at that time, what they longed for was a little more rain outside the city, to relieve the arid land and let the crops grow rapidly outside the city, but Jinjiao Laolong's behavior did not solve this urgent need.
Finally, the Jade Emperor learned about it and said that he would kill this old golden horned dragon on the earth. After learning about this, Jinjiao Laolong hurried to Li Shimin's palace, hoping that Li Shimin would spare his life. Finally, Li Shimin also agreed to Jinjiao's request and tricked Wei Zhi, the dragon slayer, into getting drunk in the palace. Finally, Wei Zhi dreamed of beheading a golden dragon in his dream. Of course, legends are just legends after all.