Length of Railways in Operation refers to the total length of the trunk line under passenger and freight transportation (including both regular operations and temporary operations). In the case of wholly or partially double- or multi-track railways, calculation is based on the actual length of the first track, regardless of other tracks, station sidings, tracks under the charge of stations, branch lines, special-purpose lines and connecting lines. The length of railways in operation is an important indicator of the development of infrastructure for railway transport, as well as the foundation for the calculation of passenger-kilometers and freight ton-kilometers, traffic density and utilization efficiency of locomotives and carriages.
    Length of Highways refers to the length of highways built in conformity with the grades specified by the Technical Standards JTJ01-88 for Highway Engineering, formally checked and accepted by highway authorities and put into use. The length of highways includes that of suburban highways at large and medium-sized cities and highways passing through streets at small cities and towns, as well as the span of bridges and ferries. However, it does not include the length of streets in large and medium-sized cities and highways built for production purposes at factories, mines, forest areas and agricultural areas. If two or more highways share the same segment, the length of the shared segment is only calculated for once and no duplication is allowed. The length of highways is an important indicator of the scale of development of highway construction, as well as the foundation for the calculation of transport network density and other indicators.ª¥
    Length of Navigable Inland Waterways refers to the length of natural rivers, lakes, reservoirs, canals, and ditches open to navigation during a given period, which enables the transport by ships and rafts. This includes channels open to seasonal navigation for an accumulative period of over 3 months in a year, but excludes river courses used exclusively for wood or bamboo rafts on an irregular basis. This indicator reflects the scale, level and development situation of the inland waterway network.
    Length of Civil Aviation Routes refers to the length of all routes for regular civil aviation flights. Calculation of route lengths is based on the distance between airports, usually in either of the following ways: duplicated calculation of route lengths, which directly sums up the length of every single air route; or singular calculation of route lengths, which calculates the same segments of aviation routes shared by two or more routes only once. In general practice, the latter is used, as it can precisely reflect the size of the civil aviation network and indicate the extent to which civil aviation serves the national economy and the needs of the people.
    Length of Petroleum and Gas Pipelines refers to the actual transport distance of oil or gas products, generally calculated as the length of single pipelines. Inclusion of double pipelines and alternate pipeline in the calculation is termed the extension length of petroleum and gas pipelines, which indicates the actual length of the pipelines built. In general practice, the ¡°Length of Petroleum and Gas Pipelines¡± exclusive of double pipelines is used, which reflects the scale and degree of development in pipeline transport.
    Freight (Passenger) Traffic refers to the volume of freight (passengers) transported with various means. This indicator provides a quantitative measure of how the transport industry serves the national economy and the needs of the people, as well as an important reference for drafting and checking production plans in the transport industry and for studying the scale and speed of development in the transport industry. Freight transport is calculated in tons and passenger traffic is calculated in the number of persons. Freight transport is calculated in the actual weight of goods regardless of traveling distances and types of freight; while passenger traffic is calculated as the number of individuals traveling once, regardless of traveling distances, ticket prices, whether the passengers are traveling with half-price tickets or child tickets.
    Freight Ton-kilometers (Passenger-kilometers) refer to the sum of the products of the volume of transported cargo (passengers) multiplied by the transport distance. These are important indicators of the total achievements of the transport industry, as well as the major foundation for drafting and checking production plans in the transport industry and for calculating the efficiency, labor productivity and the cost of transport enterprises. Normally, the shortest distance between the departure station and the destination station (i.e. the payable distance) is the basis to calculate the freight ton-kilometers and passenger-kilometers on. These indicators are calculated as follows:
Freight Ton-kilometers (Passenger-kilometers) = ¡Æ(Freight (Passenger) Traffic ¡ÁTransport Distance)
    Volume of Freight Handled in Ports refers to the volume of cargo passing in and out of the harbor area that undergoes the loading and unloading processes, including mails, checked baggage and bales, as well as fuel, material and fresh water supplies to ships. The volume of freight handled may be classified by direction of flow as import volume and export volume, or by nature of cargo as volume of freight for domestic trade and volume of freight for foreign trade. The classification of volume of freight handled and its direction of flow are important indicators of the production capacity of ports.
    Possession of Civil Motor Vehicles refers to the total number of vehicles that are registered at transport management offices under the public security authorities and provided with civil vehicle licenses and tags according to the Work Standard for Motor Vehicles Registration at the end of the reference period. Major categories of vehicle are: passenger vehicles, freight vehicles and other vehicles in terms of structure; private vehicles and organization-owned vehicles in terms of ownership; commercial vehicles and non-commercial vehicles in terms of use; large, medium, small and mini passenger vehicles, and heavy, medium, light and mini trucks in terms of size.
    Business Volume of Postal and Telecommunication Services refers to the total amount of postal and telecommunication services, expressed in value terms, provided by postal and telecommunication enterprises for the society. Postal and telecommunication services can be classified as letters, parcels, remittance, delivery of newspapers and magazines, fast mail service, express mail service, savings deposits, stamps for collection, public and individual telegraph service, facsimiles, long-distance telephone service, leasing of telephone lines, urban paging service, mobile telephone service, data communication through packet networks, network elements lease and maintenance, etc. To calculate the volume, the business volume of each product is multiplied by its average unit price (at constant prices), summed, and added to income from other services such as leasing of telephone lines and equipment, maintenance of telephone switchboards and lines on behalf of customers. This indicator reflects the overall achievements of postal and telecommunication services during a given period, and is an important reference for studying the composition of business volume and the development trend of postal and telecommunication services. This volume is calculated as follows:
    Business Volume of Postal and Telecommunication Services = ¡Æ(Business Volume of Each Product¡ÁConstant Unit Price) + Income from Leasing, Maintenance, and Other Services = Business Volume of Postal Services + Business Volume of Telecommunication Services
    Mobile Telephone Subscribers refer to persons who own mobile telephone numbers and are connected with the mobile telephone communication network through mobile telephone switchboards, including contracted subscribers and pre-paid subscribers for intelligent network. One mobile telephone number is calculated as one subscriber.
    Local Telephone Subscribers refer to subscribers that are connected to the local telecommunication service provider through fix line network, including household subscribers, institutional subscribers and public telephones. They are also classified as urban subscribers and rural subscribers according to locations, or fixed-line subscribers and wireless subscribers according to the means of telecommunication. Before 1997, urban subscribers referred to those connected to urban telephone networks in county towns and cities, while rural subscribers referred to those connected to rural telephone stations at or below the county level, clustered around the county town (excluding urban subscribers), and further connected to the county, towns and townships, administrative villages and villagers¡¯ groups. Since 1997, the classification of telephone subscribers into urban telephone subscribers and rural telephone subscribers was modified on the basis of geographical location of the subscribers, which is different from the previous distinction between urban telephones and rural telephones.
    Urban Telephone Subscribers refer to the number of telephone subscribers located at municipalities under the jurisdiction of the central government, cities under the jurisdiction of provinces, cities at prefecture level, downtown and suburb of cities at county level and county towns (including county towns where the county governments are located, and towns where the governments of other administrative regions at county level are located), that are connected to the public line telephone network, including the number of telephone subscribers in independent mining areas, forest areas, and military zones located in rural areas.
    Rural Telephone Subscribers refer to telephone subscribers located at townships, towns and villages outside the range of cities according to administrative jurisdiction.
    Wireless Local Telephone Subscribers refer to the number of subscribers who own wireless local telephone terminals connected to the public telephone network through PHS, SCDMA, and CDMA450 systems based on base stations and access network equipment.
    Number of Internet Subscribers include both narrow-band dial-up users and broad-band access users of the internet. Narrow-band dial-up users are further classified into registered dial-up users, pay-per-calling users, and pre-pay card users. Registered dial-up service enables internet access through fixed accounts provided by basic telecommunication operators. Users of this service apply to the operators or their agents for accounts and passwords, with which they dial special numbers for internet connection and acquire dynamic IP addresses through authentification to gain access to the broad-band internet. Pay-per-calling service implies that instead of applying to the operators or their agents, users only need to dial a certain operator¡¯s special numbers to gain access to the internet and pay internet fees together with their calling fees. Pre-pay card users refer to those connected to the broad-band internet through PSTN and N-ISDN networks with accounts and passwords provided by the pre-pay cards. Broad-band access users (exclusive of XDSL and LAN users) refer to users directly connected to broad-band internet nodes through packet networks, DDN networks, frame relay/ATM networks, and special analog or digital lines, bypassing the broad-band IP MAN provided by basic telecommunication operators.
    Capacity of Long Distance Telephone Exchanges refers to the rated capacity of telephone exchanges connected to long distance telephone networks, including capacity of international telephone exchanges.
    Capacity of Local Telephone Exchanges refers to the capacity of telephone exchanges installed in the offices of telecommunication service providers for communication between fixed telephones. It includes the capacity of both manual and automatic exchanges in use and for stand-by purpose. It consists of the capacity of office telephone exchanges, access network equipment(including wireless city call) and subscriber exchanges.
    Capacity of Mobile Telephone Exchanges refers to the maximum number of subscribers that can be served simultaneously, calculated according to a certain calling model and the handling capacity of the mobile telephone exchanges.