"Han Li Wen Jia" records that "people can only drill wood for fire, and they are familiar with guns, so they have no abdominal diseases and are different from animals"; "Everything is done wrong" records that "in ancient times, people ate fruit clams, which smelled fishy, hurt the stomach and made people sick. Some saints made a fuss about making a fire, which made the people happy and made them king of the world, named "Sui people"; "There is no White Tiger Pass." It is recorded that "drilling wood for fire, teaching people to cook, nourishing people's interest, avoiding odor and removing poison are called embarrassing people." Suirenshi is equivalent to the era when China's primitive society progressed from using natural fire to making artificial fire.