Provide dealers with a self-service platform for online ordering, inquiry and reconciliation, and liberate most of the coordination between customer service personnel and dealers. Provide a model promotion policy platform to the finance department, automatically implement the promotion policy when the dealer places an order, solve the problems of "buy free" and "buy free and discount policy", and automatically withdraw and cash the dealer rebate according to the contract, pick-up and payment collection, so as to assess the dealer. Provide a sales prediction platform to the planning department. The headquarters predicts the sales volume of conventional products nationwide, and the dealers predict the sales volume of new products around the country, and limit the quota of new products when picking up goods. Divide the sales account sets according to the product line, and distinguish and straighten out the multi-party settlement relationships of both parties, three parties and returns.