There are two kinds.

There are three and four wild cards.

Three, which is which.

Fourth, turning a tube is two, and so on.

The west wind and the north wind are not flowers, but all others are flowers.

A pair of mahjong heads

Hupai Shu Hua suan fan

Pinghu,

Consistent,

Touch Hu 4 3 1 Yes,

Big crane, only one card in hand)

If you have a wild hand, you can only touch yourself. If there are no wild hands, you can eat Hu.