Is it true that white lotus fish will take advantage of heavy rain to fly into the buckwheat fields?

No.

Fish cannot fly.

One of the species of rays is called a flying fish. It seems to be able to fly briefly on the sea surface, but in fact it is not considered flying, it can only be said to be gliding. The appearance of the ray is very peculiar. It has a long pectoral fin that extends all the way to the tail, just like wings. It can jump out of the water briefly, to a height of more than ten meters, and the longest flight distance can reach more than 400 meters. , can stay in the air for more than 40 seconds.