1, We promise to execute the terms in the contract strictly and supply the product with good quality and quantity on schedule as the customer required. 2, We promise to control the quality of the product and return or change the purchase if not qualified. 3, We promise to offer the instruction of handling and technical consultation in order to supply a following service through the whole course. 4, We promise to establish a self-contained customer-profile to communicate with our customer actively and to receive the suggestions from our customers. 5, We promise a speedy respond for any problem occurred.