It goes without saying that the Japanese love hot springs. It takes three steps to make a small soup and five steps to make a big soup. Bathing has become a very important part of Japanese people's daily life, and it has also developed a set of bathing culture and hot spring treatment arrangements different from other countries, which we call "soup culture". The ancient Romans in the European continent, which also has a long history, heated it with spring water and then flowed into the built bath for people to use. Among them, the famous hot springs in Bath, England and Turkey have been used to this day.