Second, purchasers have to provide all the related information about the demand of our customers to our approved vendor list in order to let them know our requirements. Then, we will let them sent or request for quotation price to the purchasing department. When deciding to use more than one supplier for one products, purchaser have to weigh these advantages against the possible disadvantages of higher price and poorer service when you buy smaller quantities from two vendors rather than larger quantities from a single, reliable one.