2. Get off at Taipingzhuang and go to the north of West Road. There used to be a 20 yuan whose name I can't remember. You can almost get there by taking a bus on Chaoyang Road.
3. There should be one in the north near Erwai Road in Chaoyang District, which seems to be 19 yuan. I have seen it before.
These places are all outside the East Fourth Ring Road.
Tianfu Tofu Flower Shop (Xidan Store) Branch Address: About 40/F, B 1 Xidan Cultural Plaza, No.80 Xidan North Street, Xicheng District.
Guagua Snack City Address: 20 yuan, 3rd Floor, Beijing Forestry University Student Dining Hall, No.35 Tsinghua East Road, Haidian District.
29 yuan Korean BBQ Hotpot City (Wangyuan East Road Branch) Address: Xiaojing Wangyuan East Road, Fengtai District
Happy Ranch Buffet Hotpot Address: 40 yuan, 2nd floor, Yangyuan Building, No.32 Huayuan East Road, Haidian District.
Dingdingyang Rotary Buffet Hotpot (Sunshine 100 Store) Branch Address: Sunshine 100 Underground Supermarket, No.2 Guanghua Road, Chaoyang District, 28 yuan
Self-service address of Shitianshang Street: about 50, 4th floor, Wangxin Commercial Center, Lize West Street, Wangjing, Chaoyang District.