Don't come to the story of Heilongjiang Black Dragon.

Legend has it that Black Dragon's father, surnamed Li, is a carpenter. On the day when the black dragon was born, his mother was scared to death. When the black dragon escaped, his father cut off his tail with an axe. Then the black dragon fled to Bailong River, and then they began to compete for territory. The black dragon and the white dragon fought for days and nights. The black dragon told the villagers in advance that I had been fighting with the white dragon for several days, but I had to eat something to replenish my strength these days. The black dragon said, if the river turns black, you throw white flour steamed bread into it. If the water turns white, you will throw lime steamed bread into it. The white dragon was defeated by the black dragon after eating lime steamed bread.

This is what I heard from others. I don't remember exactly. What I'm talking about is probably.