Modern circulation changes with the development of computer network technology and communication technology, Website production Ushered in the information age (e age) led by e-commerce. The way of information exchange has changed dramatically. Electronic commerce (e-business. e-commerce) conducts transactions of goods, commercial intermediate links, currencies and services based on digital networks, aiming at reducing the business cycle of the information society, reducing enterprise costs, improving business efficiency Improve service quality. Electronic tools (development with computer as the core, formation of interest, labor, service market), expansion of commodity category (formation of intangible goods, such as credit, brand, etc., can be regarded as independent goods) As well as the expansion of the scale of business activities (the global economy has greatly catalyzed the process of e-commerce, which has promoted the extension of the scope of services from the stage when websites were suitable for dissemination in the 1970s to the stage when they were used for sales and order acceptance. In the s, enterprises established a public connection ("website MIS"), implemented an online connection stage, expanded to inter enterprise interconnection ("enterprise A-MI is police MIS"), and electronic data exchange stage [1.2] ·E-commerce has brought new ideas to the logistics system, and the construction of the logistics system will inevitably lead to problems in the logistics network, such as the calculation of the external value of the logistics system and the networking of the management system, the logistics nodes are called nodes, strongholds, networking and the logistics channel network. Therefore, The systematization of logistics network has become the basic condition of modern logistics system, ensuring the realization of power supply in Linwu. 
As for the concept of network, China's Cihai (1989 edition) defines it as: "the general name of a circuit or part of it., which sucks the modern Chinese dictionary) (2002 supplement), which is interpreted as:" 0 reticular things. ② refers to a system composed of many interlaced branches. ③ In an electrical system, a circuit or part of it composed of several components is used to make electrical signals transmit according to certain requirements. " ['] Longman Modern English Chinese Dictionary (1996 edition) defines "network" as: ① a large system of lines, tubes, wires, etc., that cross formeet one another. Oa group or system who members are connected some way. ③ A group of radio or television stations independent places using many of the same broadcast networks.. large com-pany producing material for broadcasting by such a group. A broadcasting company that produces programs for such a network“ [s7 In real economic life, the concept of network has penetrated into all walks of life, and has been widely used in the practice of various system construction. In transportation economics, network refers to the collection of a series of interconnected transportation giants in the transportation system composed of various transportation lines and transportation facilities in a certain region, becoming the product of the turbulent development of economic and social space to a higher stage: 763 In computer technology, network refers to an organization form in which two or more computers in a certain area are connected through a connection medium as required for users to share files, programs, data and other resources [[7l. In operational research graph theory, network refers to the use of a trunk line segment (a measure of direction and value) to transfer several points (a difference of grade) The connected general or connected graph can be used to study the state, change and trend of the internal relations of various spatial entities [8). In regional economics, the network is the combination of nodes and lines, and nodes are the heart of the network. Lines are the channels that constitute the functional relations between nodes, nodes and domain planes, and domain planes and domain planes [.]. The network is the "vein" of the regional economic and social space. There is an objective and inevitable conversion relationship between the spatial structural elements of points, lines and planes in geometry and physics, that is, connecting points into lines, intersecting lines into networks and expanding networks into planes.
In the process of logistics activities, the network, as a form of the spatial structure of material circulation, not only represents the regional links of logistics, but also represents various supports for such links. Therefore, the "network" in the logistics network system mainly includes
It includes the following three meanings.
(1) The network represents the channels of economic and social spatial connection. This channel is spatially represented as the physical structure of the network composed of linear infrastructure such as transportation and communication, railway network and highway network, etc., which are interwoven into a network. Various forms of "flow" (such as information flow, etc.) constitute the non-material structure of the network. The starting point and ending point of the flow, the gathering point and the diffusion point, as well as the flow direction, flow path, flow t, etc. are combined to form a logistics network. In economic and social activities, the economic links between nodes and fields, and between nodes, must rely on the logistics infrastructure network and logistics information network. Modern logistics network is an indispensable prerequisite in economic and social activities, It is also the internal driving force for the development and change of the economic and social structure
(2) The network represents the system of economic and social spatial connection. The basic composition of this system is the logistics relationship between nodes, domains and between nodes and domains. The logistics network is generally manifested as the exchange and connection of materials and information of the economic society, reflecting an orderly structure of the development of economic society and logistics system. Although the formation of "network system" depends on trunk and channel, "channel" does not necessarily form "network system". It also needs the goal of box optimization to form an orderly "network system"
(3) The network represents the organization of economic and social spatial connection. The basic composition of this organization can be divided into two forms. One is the management and operation organization that reflects the multi-level and multi form spatial economic network connection, such as local government, market intermediaries and enterprises; The other is the market mechanism of factor flow formed to improve the economic network connection. Logistics network system is an organizational form of economic and social ties, and also an inevitable product of social division of labor. It has the characteristics of dynamic organizational role, rich organizational content, and equal organizational relations
Channel, system and organization reflect the connotation of network in the spatial structure of modern logistics system. In the process of logistics network systematization, although the three network meanings under different space-time conditions reflect differences in degree, there are always complex internal links. They are inseparable from each other. With the strengthening of social division of labor and the upgrading and integration of economic and social activities, the reasonable construction of logistics network system plays a very important role in ensuring commodity circulation and information exchange, strengthening economic ties, optimizing economic structure, etc.
