After finding a product that is being dropped off, you can use your own account to purchase and pay, and fill in your customer's delivery address. Then when Alibaba drops the product, it will be sent to the customer according to the address you left. To put it simply: the customer buys your product---you buy the supplier's product---the supplier then delivers the product---the customer receives the product from the supplier---the customer confirms receipt---the funds are transferred to your account---you confirm receipt and purchase the product from the supplier-----the transaction is completed.