As a independent inspection and quality control part, we ONLY charge buyer service charge based on one of below cooperation styles.
1) case by case  2) commission  3) fixed monthly service fee

Note:
1,buyer should also pay for extra expense.When we go to your supplier's company to check the product quality or to verify them, we need to pay for the ticket, food , hotel , all of these expense is belong to extra expense. it should be checked with buyers and paied beforehand.
2, Payment method: Paypal or T/T