Yellow mushroom, scientific name is Armillaria luteo-virens (Aalb.et Schw:Fr.) Sacc.], also known as "Emperor Mushroom", the authentic production area is Qi, Haibei Prefecture, Qinghai Province Even area. Qilian Yellow Mushroom, a specialty of the Qilian Mountains, is known as one of the "Top Ten Treasures" of Qinghai. Qilian County in Qinghai Province is a famous production area. The county's mid-level Qilian Mountains are rich in forest and grassland resources, pollution-free and high altitude. The yellow mushrooms produced are large, thick-fleshed, low in water and fine in texture, making them a famous mountain treasure on the Qinghai-Tibet Plateau. In 2008, it was approved as a Chinese geographical indication certification trademark. During the Yongzheng period, Nian Gengyao led the Qing army to quell the Qinghai-Tibet rebellion, and the local kings of Qinghai surrendered. Among the tributes presented to the court were yellow mushrooms, so they were also called "imperial mushrooms".