Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for processing data. One of the systems include: a service platform comprising a plurality of service modules and an application programming interface layer comprising a plurality of application programming interfaces (APIs) to enable users to invoke the service modules to process information related to an order associated with importation of a merchandise, wherein the information is provided, or to be provided, to a service authority for requesting clearance for the order, wherein a first application programming interface of the plurality of application programming interfaces enables a user of the service platform to invoke a smart contract on a blockchain managed by a blockchain network, in which the smart contract performs at least one of processing of the information or processing of information related to another user of the service platform.
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