According to the Classification of National Economic Industries (GB/T4754―2002), the circulation industries include: (1) wholesale and retail; (2) Accommodation and catering industry; (3) Leasing and commercial services; (4) Resident services and other service industries. In addition, commodity logistics is classified as transportation, warehousing and postal services respectively, and e-commerce (online transactions) is classified as information transmission, computer services and software industries.