(1) customer file: customer category, name, address, telephone number, business items, business scale, business time, credit rating, payment method, required product category, monthly product demand, supplier structure, gross profit margin standard, etc.
(2) Basic business information: copy of business license, purchase contract, supplementary purchase contract, certificate and tax registration certificate.
(3) Customer characteristic information: financial strength, fixed assets, factory ownership, development potential, business philosophy, business direction, business policy, internal management status, business history, etc. ;
(4) Business information: financial performance, sales trend, internal personnel quality and conduct, business relationship with the company and cooperative attitude.