Thongzhi mushroom. According to the query buybuy.com, Bayinbrooke mushrooms are mainly Tingzhi mushrooms, which are the representative species of portobello mushrooms and the top grade of portobello mushrooms, which are non-toxic and can be eaten. Bayinbuluk Grassland, located in the northwest of Hejing County, Bayin'guoleng Mongol Autonomous Prefecture, Xinjiang, in the middle of the Tianshan Mountain Range in the mountain basin, surrounded by snow-capped mountains, at an altitude of about 2,500 meters above sea level, with an area of 23,835 square kilometers, is China's second-largest prairie, after the Hulunbeier Prairie in Inner Mongolia.