The first passerby, Li Xian, had only done things like killing chickens and trampling ants to death. He had never been involved in gambling or anything harmful to nature.
One night, he saw a group of people eating melon around a man and a woman. Although he knew in his heart that this was immoral, his feet still refused to obey and led him there.
After eating for a while, he learned what happened. It was the man who discovered the woman's cheating. The woman begged the man to forgive her. In order to make the man believe her, the woman swore on the spot that she would never do it again.
As soon as the woman finished her vows, a righteous light fell from the sky.
This light did not fall on the woman, nor the man, nor the other melon eaters, but fell squarely on Li Xian's head.
After Li Xian woke up, he traveled through time and became a high-risk profession - prince.
Li Xian is quite satisfied with his career after time travel and feels that the light is right.
A traveler must have a golden finger, and he also has one, but it's hard to describe his golden finger...