It is about the beautiful jade produced in Lantian, Xinjiang.
I don't know much about the measurement of pearls by the Dragon Lady, but in the religious and cultural class, the tutor said that the Dragon Lady dedicated the most precious luminous pearl in the Dragon Palace to the Buddha, which was later made into a positive result. It may have something to do with this. (The story comes from "Hokkekyo")
According to the antithesis of couplets, the title of mosquito repellent should also be an allusion such as offering a treasure, which is abbreviated as these four words. Probably from a strange novel like Shan Hai Jing or Buddhist Scripture.
Later, I found out from the internet that in natural history, "mosquitoes live in water like fish. They don't waste their weaving achievements, and sometimes they sell silk." However, most natural history books say: "There is Jiao Ren outside the South China Sea, where the water lives like a fish and its eyes will shed tears." The story of the shark crying beads should be familiar. Think about the rest for yourself. But one thing should be clear. I didn't find out from the Internet that Jiao Ren was also called Mosquito Man.
There is nothing to check for the deep clouds in the sea. Personally, I feel that it is a mirage-like fairyland and a land of treasure production. It should correspond to Lantian.
Personal opinion, shallow place still hope to forgive me.