Nevertheless, there unavoidably exists inconsistency among historical data in a developed port. As such, establishment of a sharing infrastructure secures a crucial position in port development strategy for information system. The infrastructure includes a two-level mechanism, namely, an administrative level and an operative level. The administrative level departments include port service authority that manages subordinate terminals. As such, a so-called scheduling center is usually set up for integrated information management, for example, such activities as customs declaration, container- collection appointment and acceptance service are handled through an integrated information platform. However, different operation systems and databases may possibly be used by different terminals, so that data transmission is rather time- and cost-consuming. Based on this understanding, the information-sharing platform is established according to the information singularity strategy, that is, the unified information is distributed to subordinate terminals by port authority. Following issues should be considered