Stone star and Rush star, one on the edge of the Milky Way, shining with bright white light; One is in the Milky Way, and it looks a little red. According to legend, a long time ago, these two stars were on the same side of the Milky Way, emitting the same white light. They are brothers, but one was born to his former mother and the other was born to his stepmother. Stepmother only loves her son, doesn't care about her former mother's life, and often bullies him.

One day, the stepmother told the two brothers to cross the Milky Way with one shoulder each, and stipulated that they must tread water instead of using a boat. She quietly packed a car full of rushes for her children and two stones for her children.

Stepmother's children walked very fast at first, because they picked a little rush, which was not heavy at all. Soon, they surpassed their former mother's children. However, the former mother's child was burdened with stones and had to walk slowly.

They reached the middle of the river, and gradually, the stepmother's children felt heavy on their shoulders-because the rush was wet and heavier, and because he was spoiled at ordinary times, the water quality was not very good, and he had no strength, so he walked more and more slowly. However, the child born to his former mother did not feel hard because the stone he picked up would not become heavy after passing through the water, but because the buoyancy became lighter, and because of the good hydraulic power, he had the strength.

As for the stepmother's child, because the rush is getting heavier and heavier, he can't go any further, so he has to struggle desperately in the river, and his face is red and he can't get ashore. From then on, he can only glow faintly in the milky way. Because he picked Juncus, people called him Juncus Star. And the star that crossed the Milky Way, because he picked a stone with strong light, people called him a stone.