You must apply to the Food and Drug Administration for a "food and beverage service license" (the hygiene license has been cancelled). The materials to be submitted can be downloaded from official website, with legal person ID card, restaurant plan and so on. It could be a field trip. After finishing, take the catering license and related materials to the industrial and commercial bureau for a license. After the permit is issued, you can start business. It should also be registered by the tax bureau, but the first two are the key.