Platform merchants mean that merchants (platforms) can not only buy and sell goods independently, but also develop non-platform merchants to settle in and let them use this platform to buy and sell goods. For example, JD.COM is a typical platform merchant (not only the platform itself is engaged in commodity trading, but also many small and medium-sized businesses have settled in its platform to engage in business activities).

Foreign card collection refers to the e-commerce business in which buyers pay through credit cards and debit cards issued by overseas banks or overseas credit card companies, which can be used worldwide.

Internal card collection is relative to external card collection. The so-called internal card receipt is an e-commerce business in which the buyer pays through bank cards (including credit cards and debit cards) issued by domestic banks and settles in RMB.