On a sunny morning, Gai Yan met the person who gave him a golden finger from the Space and Time Bureau. He gave Gai Yan a pill, saying that if he took it, he would lose weight without any side effects. Then, and then... Gai Yan stayed in the hut for eight hours.
Concept: Don't eat the golden fingers on the roadside. There is no free lunch in the world. If there is one, then let it be.