**customer** 1, fill in the sales of outbound documents associated units, if you use the system, will default to generate a POS client, outbound documents will be automatically associated to the customer, the user cannot edit, and delete 2, click on the delete icon in the customer name card, can remove the customer; If the customer existing documents, do not delete 3, click on the edit icon in the customer name card, can edit the customer information, such as customer name, help check code, state, telephone number, address, contact person, etc., click save 4, click "new customer", can edit the customer information, such as customer name, help check code, state, telephone number, address, contact person, etc., and click save to add