Carrefour in Zhongguancun has a Yangshengtang drugstore. Go and see if there is. It's in front of the shop on the second floor underground. Then there are pharmacies in Haidian Street, and there are pharmacies outside Haidian Street. I forgot the name, hehe, it seems to be a golden elephant drugstore. Look at these shops on the map. They are all near Zhongguancun, hehe. . Baidu Maps