Taier fish with Chinese sauerkraut didn't see killing fish in the kitchen.

The restaurant uses pretreatment method to kill fish in hidden places and buy the killed fish.

1. Restaurants adopt the method of processing in advance: some restaurants will process some ingredients in advance during busy hours to save time and improve efficiency. This includes killing fish in advance and using them directly when necessary. Doing so can ensure the freshness of ingredients and food safety.

2. Restaurants kill fish in hidden places: Some restaurants do some work that needs to be handled in hidden areas of the kitchen, including killing fish. This is done to prevent customers from seeing these processes in the dining area, so as to maintain a clean and comfortable dining environment.

3. The restaurant has bought the killing fish: Some restaurants will choose to buy the killing fish instead of killing the fish in the kitchen. Doing so can save time and labor costs and ensure the freshness and quality of ingredients.