Ask the owners of other supermarkets where they buy goods and where the wholesale market is. There is no need to rush to get all the goods ready at once, and there are not all the things in the supermarket. After the store opens, you will take the initiative to purchase goods on your behalf. But plastic goods must be imported by themselves, and some places can also deliver goods.
License: business license, health certificate, food circulation license, tax registration certificate, tobacco certificate. Fireworks license and salt license can be done or not.
The decoration of the store can't provide suggestions. It depends on how you decorate it. Generally, milk is put at the door.