At the entrance of the East Palace of the Summer Palace, there are several shops on the south side of the east-west street, facing the main entrance. I bought all my knives, sticks, whips and guns there. I wonder if I am building roads now.
Zhushikou is tens of meters to the east, and there is an alley to the south. There is a shop to buy weapons in Hutongkou.
There must be many other places, but that's all I've been to. I can only tell you this. I'm sorry