In China, it is known as a "gentleman in flowers". Throughout the ages, people have regarded her as a symbol of beauty, loyalty and purity, praising her for "coming out of the mud without dyeing, being clear without demon". Lotus is a perennial aquatic herb. Lotus planting in China has a long history, which was recorded in detail in Qi Yao Min Shu more than 400 years ago. Archaeologists in China once found two ancient lotus seeds at the Neolithic Yangshao cultural site in Dahecun, Zhengzhou, Henan Province. Lotus has certain medicinal value. Lotus seeds are sweet, flat, astringent and non-toxic. Eating lotus seeds can "tonify the middle and replenish qi, eliminate all diseases, and take it for a long time, so that people can strengthen their bodies, resist aging and prolong their lives." According to modern medical research, every100g of fresh lotus seeds contains 4.9g of protein, 0.6g of fat, 9.2g of carbohydrate, 0.8mg of calcium/kloc-0, 54mg of phosphorus, 0.2mg of iron/kloc-0, and contains liensinine and various vitamins. Lotus seeds, which enter the spleen, kidney and heart meridian, have the functions of nourishing the heart and spleen to stop diarrhea, nourishing the kidney and astringent essence, nourishing the heart and calming the nerves.