Free visit. Going to Dongmen Old Street, the first store is Shangchizhai Pharmacy. There is a sign outside the door, which must have some history. Some clerks may also be the boss at the time, they saw that I was obviously a tourist, gave me a look as if I didn't want me to go in, I didn't know if it was time for tourists to visit, so I just stopped outside to peep and take pictures. It is an old-fashioned Chinese medicine.