From the Jin dynasty to the Tang dynasty, people who laughed at a person who lacked good education and did not understand the hygienic habits of high society often said that the person "does not know bath beans. " Bath beans were high-end sanitary cleaning products invented during the Wei, Jin, and Northern and Southern Dynasties In the past, when people wash, the only way to remove oil stains is basically rice soup, noodle soup and natural saponin. Bath beans are based on the fines made from various beans as the main ingredient, using the natural oil-removing properties of beans. Clean the skin. Based on this text, it can be concluded that:. ['Bath beans were invented by high society.', 'The appearance of bath beans is due to the improvement of living standards.', 'Ordinary people rarely use bath beans.', 'The decontamination ability of bath beans is far beyond that of rice soup, noodle soup and saponin.']