Sinopec, Sinopec and other large companies generally implement online procurement of bulk materials and equipment. The first is to establish a professional website, and the second is to conduct bidding for equipment or material suppliers, from which suppliers are selected and uploaded on the Internet in the list of shortlisted suppliers. Affiliated units need to purchase to report the demand plan, click on the Internet, bargaining, and then the two sides to meet and contact, agree on the price, sign a supply contract.