The black fungus of Yanjun Farm grows at the foot of Xiaoxing'anling and the banks of Heilongjiang, where the four seasons are distinct and it is known as the "natural oxygen bar". The raw materials of the fungus bag of Yanjun Farm are mainly oak birch and other broad-leaved sawdust. It is watered with mountain spring water and breathed in the fresh air of the forest oxygen bar. No pesticides and auxin are used. It is naturally dried and artificially kneaded. The dry fungus has thick meat. The color is positive, the nutrition is not rich; the foaming rate is high, the elasticity, the luster, and the clear fragrance of the big forest; the round and delicate when eating, it is loved by customers all over the world. We have successfully registered Yanxing Island, Yanxing Island, Black Onyx, Yanxing Island Aiduoduo and other 4 brands to enter the national market. Among them, Yanxing Island Black Fungus has passed the national organic fungus certification and the national quality traceability system. Certification has also been recognized as a designated product by the National Antarctic Research Ship Xuelong.