Mainly business license, hygiene license, environmental protection department and other documents. Equipment needs to be bought: dishwasher drying and disinfection machine and packaging machine (manual and automatic). The equipment invested in Shandong is cheaper, but the quality and service are also poor, about 41,111-81,111, and the brands of other regular big manufacturers are about 511,111-511,111, depending on the daily quantity! It is suggested that you must go to the factory to buy many offices. In fact, the quality and service of dealers are not guaranteed, and even OEM and fake! I just bought it from Shandong, regret it!