Beijing Road, Panlong District, Kunming City, Yunnan Province. According to a search on Baidu Maps, we learned that Kunming's century-old Shuncheng Street Posubao store has moved to Tongde Plaza, located on Beijing Road, Panlong District, Kunming City, Yunnan Province. Posu buns are a traditional snack in Kunming, Yunnan Province. They are made of high-gluten refined white flour, cooked lard, cooked cloud legs, diced bee meat, minced winter mushrooms, etc.