After-sales service, the activities of the various services offered in the sale of goods. Work from the marketing point of view, after-sales service is also a promotional tool. Tracking the follow-up stage, with the steps of the sales personnel to take a variety of forms, and after-sales service to enhance the credibility and expand market share, and improve the efficiency and effectiveness of the marketing.

Technical Support refers to a form of after-sales service of products to its product user, to help users diagnose and solve the obvious symptoms appear in the process of using the product, the technical problems that may.