EPC general contract projects (design, procurement and construction) need to purchase a large number of equipment and materials, which are rich in content. The required raw materials, all kinds of equipment and materials are complex, ranging from daily life to office supplies, from construction machines and equipment to steel structure installation materials, from mechanical and electrical equipment control system to precision instruments and meters. May be transported to the project site via logistics. The goods are diverse in size, shape and weight, and the shipping location is not the same, resulting in a variety of logistics packaging, methods, transportation scattered, as the link between material procurement and site construction logistics is particularly critical.