List what are the bills involved in each link of purchase, sale and inventory

1. Purchase and purchase - purchase order;

2. Sales, shipment, return and exchange - sales order;

3. Inventory count - inventory Order;

4. Inventory transfer - transfer order;

5. Customer debt, supplier reconciliation - statement;

The above are basically Invoices covering all aspects of Qinsi's purchase, sale and storage need to be printed for backup or shared with WeChat friends.