Who is the son of Wu Wei Lao Li?

Lao Li's son is a black dragon. The black dragon told Lao Li to have no tail, and Li's wife woke up without her son and cried. On the third day after birth, the child went home to visit his mother in the evening, and after nursing, he leaned on the beam. When his father saw this scene, he was frightened and picked up a sickle to drive the child out of the house. The child looked back at his mother, reluctantly, and had to escape from the window lattice. Dad caught up and cut off a tail. This is why later generations called the black dragon Lao Li without a tail. Mother Li missed her son day and night, surprised and afraid, and died of grief and indignation.

Describe the benefits of the black dragon to the people

The black dragon heard that there lived a little white dragon in the Bailong River in the north, which endangered the people. The black dragon is determined to get rid of the white dragon. On the day of the duel, I suddenly saw the black wave column rise and the white wave appeared. People on the shore throw white buns when they see black waves rising, and throw white balls when they see white waves appearing. The black dragon eats white steamed bread, and its strength is getting stronger and stronger, while the white dragon swallows white balls, and its abdomen is cramped, and its physical strength is getting weaker and weaker. After three days and nights of war, the black dragon finally defeated the white dragon. The black dragon patrolled the great river day and night, and the original Bailong River was renamed Heilongjiang.