Why did the Monkey King go to the Dragon King in Hong Haier War?

In Hong Haier, the Monkey King found the Dragon King who can control the water. Hon Hai spat three real fires, but Wukong couldn't win, so he turned to the Dragon King of the Four Seas for help and begged for rain to put out the fire. The Journey to the West is the first romantic novel written by Wu Cheng'en in China in ancient Ming Dynasty. The novel mainly tells that after the Monkey King was born, he studied with Bodhi's ancestor. After disturbing Heaven, he met Tang Priest, Pig Bajie, Friar Sand and Baimalong, and went west to learn Buddhist scriptures. He went through difficulties and obstacles along the way, exorcised demons, and finally arrived in the Western Heaven to see the Tathagata.