According to legend, in the Qing Dynasty, there was an island in the middle of a lake outside Mengzi in southern Yunnan. A scholar went to study on the island. The scholar's virtuous and hardworking wife often cooks his favorite rice noodles and sends them to him for dinner, but when he leaves the island, the rice noodles are no longer hot.

Later, I accidentally sent chicken soup. Miss Scholar found that chicken soup was coated with a thick layer of chicken oil like a pot cover to keep the soup warm. If you eat with seasoning and rice noodles, it will be more refreshing.

So she first cooked the clear soup of fat chicken and bone, and then coated it with thick chicken oil; Rice noodles are made at home. Many ingredients are sliced on the island and cooked in boiling oil. Then rice noodles are added, which is delicious and smooth.

As soon as this law was spread, people followed suit, because it was necessary to cross the bridge to the island and to commemorate this good wife. Later people called it "crossing the bridge rice noodle".