Does the hotel need OEM or customized ingredients?

Of course not, because hotels and factories have different concepts.

Hotels are responsible for buying and selling ingredients, and they have no obligation to process or treat them. At most, their obligation is to store the ingredients after purchasing them in the hotel, and then make them ready or handle them in other ways when necessary.

In addition, I have never heard of customized ingredients, such as chicken wings. The chicken wings I have ever seen are at most two fingers thick. If you want to buy chicken wings bigger than your palm through customization, I don't think there is such an ingredient!