What is the story of the sea dragon king in the three plays of The Cultivator?

The Dragon King, the legendary king in charge of the underwater aquarium, is in charge of clouds and rainfall. Dragon is one of the four gods in ancient China mythology. Legend has it that dragons can spread clouds and rain, eliminate disasters and reduce happiness, symbolizing good luck, so it is a custom for Han people all over the country to dance dragons to pray for peace and harvest. There are "Dragon King Products" in Taishang Cave's Divine Mantra Classic, which lists "Five Emperors Dragon King" by orientation, "Four Seas Dragon King" by ocean, 54 dragon king names and 62 dragon king names by everything in the world. There is an island in the East China Sea, where there is a village called Lujia Village. A long time ago, there lived a dozen farmers named Lu in this village. They planted some bowls of land on the seashore and hillside, and caught some sand crabs, fish and shrimp in the sea to make ends meet.