What does mahjong dice 4 mean?

Start with yourself and count counterclockwise. You can't have one of the two dice.

Second, your next home, also called Shun,

The third is Youjia, also called Youjia.

The fourth is to go home, also called backhand, so it is called 4 reverse.

Fifth, oneself, also called hand in hand,

And so on until the end of 12.