Some people say that the foot is a person's "second heart". As the saying goes, "cold starts from the feet and disease enters from the mouth." Soaking feet with hot water can accelerate blood circulation and relieve fatigue. There is an old health care proverb: "300 steps after a meal, a pot of soup before going to bed." The word "soup" here is not the vegetable soup we are talking about now, but actually hot water for soaking feet. The ancients kept in good health. Some people suggest taking a rest after meals and soaking feet with hot water before going to bed. (In ancient Chinese, the word "soup" means hot water, such as the idiom "go through fire and water")