As early as more than 3000 years ago, people used rice washing water to bathe and decontaminate. Modern scientific and technological analysis has confirmed that rice washing water contains "water-soluble vitamins" and "various minerals", which is not only a green and nutritious washing product, but also has the effects of diminishing inflammation and relieving itching! At that time, it was cheap and ordinary bath water. Gleditsia sinensis was later discovered in the Southern and Northern Dynasties. Gleditsia sinensis has the functions of lubricating, refreshing, removing dirt, greasy and cleaning skin. Taking a bath with Gleditsia sinensis can also dispel wind and remove dampness and treat tinea.

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Rice is considered to contain a lot of vitamins and minerals contained in rice. These include: amino acids, B vitamins, vitamin E, minerals and antioxidants. According to the researchers, women in Heian period (794- 1 185) kept their long hair healthy by bathing with rice washing water.

Taomi water contains protein starch, minerals and other nutrients, which can be used for washing face and moistening skin, and can also be boiled and drunk directly. Boiled rice washing water has a good protective effect on human gastric mucosa, can eliminate the timely adjustment of gastrointestinal function, relieve indigestion, and has obvious nursing effect on human spleen and stomach.