Icon, you can't open it if the level is not enough. If the grade is 10, you can open a second dining window. The method is as above. Catering can be bought in the store, if your farm reaches grade 26 or you have yellow diamonds.
The processing workshop can process corresponding catering drinks, such as rose tea, double skin milk, apple juice and so on. The side dishes of drinks processed and sold in the processing workshop can't be bought in stores. Of course, the corresponding side dishes are sold together with the main course, which is the so-called perfect sale, and the secret recipe of perfect matching is needed.