As the civil law expression of internet plus transactions, the legal relations in online trading platform transactions constitute a complex aggregate of legal relationships composed of groups of legal relations. Specifically, they consist of three basic interlinked legal relationships: Contract relations for online trading platform services between the platform provider and the seller or service provider, and between the platform provider and the consumer. This includes the sales or service contract relations between the triad of the seller, the service provider and the consumer. These relations contain five kinds of major content, viz., the provision of transaction space, the publishing of transaction information, price escrow payment, distribution and delivery of the commodity, and transaction credit evaluation. They involve three forms of supplementary legal relations: the supplementary contract relationship between the platform provider and a third party payment institution; between the seller and third party credit reporting agency; and between the seller and a logistics enterprise. The three forms of supplementary contractual legal relations are set up to act on the major contents of the basic legal relationships in online transactions. On the basis of the online trading platform service contract relationships between the platform provider and the triad of the seller, the service provider and the consumer, the flow of the above- mentioned legal relations centers on the contract of sales or service set up between the seller, the service provider and the consumer to accomplish the aim of the online transaction, meet social needs and boost economic development.

中文翻译：

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在线交易中法律关系的结构

作为互联网加交易的民法表达，在线交易平台交易中的法律关系构成了由法律关系组构成的法律关系的复杂集合。具体来说，它们由三个基本的相互联系的法律关系组成：平台提供商与卖方或服务提供商之间以及平台提供商与消费者之间的在线交易平台服务的合同关系。这包括卖方，服务提供者和消费者三方之间的销售或服务合同关系。这些关系包含五种主要内容，即交易空间的提供，交易信息的发布，价格托管付款，商品的分发和交付以及交易信用评估。它们涉及三种形式的补充法律关系：平台提供者与第三方支付机构之间的补充合同关系；以及 在卖方和第三方信用报告机构之间；在卖方和物流企业之间。建立了三种形式的补充合同法律关系，以应对在线交易中基本法律关系的主要内容。根据平台提供者与卖方，服务提供者和消费者三方之间的在线交易平台服务合同关系，上述法律关系的流程集中于在供应商之间建立的销售或服务合同。卖方，服务提供商和消费者以实现在线交易的目的，