Qin Laosan bean curd fast food. Qin Laosan's bean curd is a soup base made of dozens of ingredients and cooked with seasonings. When shaped into a bowl, sprinkle with crispy meat, beef, chicken and various seasonings. Color, fragrance and Sichuan flavor are all excellent, which is the most authentic. Linqu County Qinlaosan Tofu Brain Fast Food Chain Store Linqu was incorporated in Weifang on 20 1 1-06-07. The company is now managed by Cai Tingting, a legal person, and its main business is catering, with a registered capital of RMB 0.055 million.