online shopping platform, catering business, agent point of sale.

1. Online shopping platforms: such as Taobao, JD.COM, etc. Search for the keyword "Weifang Buffet Annual Card" to find the relevant annual card purchase links.

2. Catering businesses: Some catering businesses will sell buffet annual cards directly, and you can consult and buy them at local restaurants.

3. agent sales points: some agent sales points will have Weifang buffet annual cards, which can be consulted and purchased at local agent sales points.