Tremella fuciformis, also known as white fungus, snow fungus, Tremella fuciformis, etc., belongs to the genus Tremella of the fungus family Tremellaceae. It is the fruiting body of the fungus Tremella fuciformis of the phylum Basidiomycota and is known as the "crown of fungi".

The fruit body of Tremella fuciformis is pure white to milky white, 5 to 10 cm in diameter, soft and white, translucent and elastic.

Tremella fuciformis is sweet, light, neutral and non-toxic. It not only has the effect of nourishing the spleen and appetizing, but also has the functions of benefiting qi, clearing the intestines, nourishing yin and moistening the lungs. It can not only enhance human immunity, but also enhance the tolerance of tumor patients to radiotherapy and chemotherapy. Tremella is rich in natural plant-based colloids and has the function of nourishing yin. It is a good emollient food that can be taken for a long time.

Tremella fuciformis originated in Tongjiang, Sichuan. De Ling, a maid of the Qing Dynasty, wrote about Tongjiang Tremella fuciformis in "The Imperial Fragrance is Misty, Imperial Kitchen": "Things like Tremella fuciformis are extremely expensive in the market and are often sold in a small box. Tremella costs one to twenty taels of silver to buy.