How to make out an invoice for the second-class medical devices with liquid dressings?

1. First of all, before purchasing Class II medical devices for liquid dressings, it is necessary to issue a purchase application and obtain the corresponding purchase budget.

2. Secondly, when purchasing second-class medical devices such as liquid dressings, it is necessary to sign a contract with the supplier, and indicate the relevant matters of invoicing in the contract.

3. Finally, after the use of Class II medical devices with liquid dressings, invoices need to be issued according to the actual use.