What is the north wind and the north flood? Mahjong.

It means it's almost finished. Mahjong is a four-player domino game, which is very popular in China cultural circles. Originally from China, Guangdong, Hong Kong, Macao, Minnan and Fuzhou are commonly known as sparrows. In mahjong, the north wind and the flood in the north mean that the game will end soon. It will be a game and entertainment equipment invented by ancient people in China. It will be made of bamboo, bone or plastic.