1. I’m not very clear about the pastry situation you mentioned. If the pastry name is registered as a trademark and is a patented product rather than an ordinary store name. What you do is an infringement. It is recommended to communicate with the store owner. The question is whether the things you operate have legal effects that are unique to the Beijing store.

2. The relevant procedures are the same. Refer to the procedures for opening a self-employed store.

3. If it is a Beijing specialty. It doesn’t seem very good to only sell one thing. You might as well communicate with the store owner directly. See if you can directly use his name to sell his stuff. This will get twice the result with half the effort. As for the legal issues involved, they are not big. Feel free to sell it