Good Citizen of the Tang Dynasty

Zhang Yishan is not diligent in all aspects of his life and does not distinguish between grains and grains. He spends his days idle, eating and waiting to die, like a salted fish, but he dabbles in all kinds of strange skills and tricks. One day, the emperor presented a strange object to the mountain, which he called mosquito coils. There were no more mosquitoes in the palace. The emperor was very pleased and wanted to reward him, but Shan refused and refused. The emperor asked why? Shan said: It contains arsenic. The emperor was shocked and said, "You unruly people are harming me again."