Auricula, also known as black vegetable, Auricularia auricula and Yuner, is a precious colloid fungus for both medicine and food in China, and it is also recognized as a health food in the world. Planting Auricularia auricula is located in Ceheng County, with an altitude of 1,088 meters and a pleasant climate. The whole process of Auricularia auricula was sprayed by mountain spring water nearby, combined with the high-altitude light in the forest and the natural negative oxygen ions. After a growth cycle of 1-3 months, all Auricularia auricula were picked manually and aired naturally. Auricularia auricula is about 3-8cm in diameter, its face is black and glossy, its back is grayish brown with uniform color and few impurities, and its texture is firm and tough. The content of protein, vitamins and iron in dried auricularia auricula is very high, the content of ammonia and iron in protein is very high, and the content of ammonia in protein is very high.