Definition: Describes courage and fearlessness.

Allusion: At the end of the Eastern Han Dynasty, Zhao Yun, a general of Shu, led dozens of cavalry to rescue Huang Zhong, who was besieged by Cao Cao's army.

After killing many enemies, they rushed out of Cao camp, and Cao army was eager to give up.

By the time Zhao Yun returned to his camp, the enemy team had already chased him to the door. At this critical juncture of life and death, Zhao Yun instead ordered the camp gate to be opened wide and stood at the door on horseback.

Cao Jun thought there were ambushes in the camp, so he had to retreat.

When Liu Bei learned of the incident, he praised Zhao Yun for his courage. This idiom describes those who are in danger and take it easy.