It covers building materials, machinery and electricity, information industry, transportation, greening and environmental protection, water conservancy and electric power, instrumentation, energy and chemical industry, clothing and textiles, printing and packaging, agriculture, forestry, animal husbandry and fishery, materials and materials, fire safety, electronics and electrician, radio and television communication, office equipment, recreation and sports, medical and health care, metallurgy and minerals, and special services. The area covers 34 provinces and cities in China and many secondary cities, and nearly 2 million articles have been published, with an increase of 3,000 articles every day. China International Procurement Bidding Network serves many enterprises that pay attention to procurement and bidding information with the strongest timeliness and interactivity.