Cross-border service is cross-border supply, also known as cross-border delivery. That is to say, providing services to consumers of another member within the territory of one member, such as nationals and commercial means of transport of one member receiving services from service providers within the territory of another member. Among them, "cross-border" refers to "service" transit, which is realized by means of telecommunications, post and telecommunications and computer networking. As for people and things, there is generally no need to cross the border in the modern scientific and technological environment. For example, electronic settlement and payment in international finance, international telecommunication services, information consulting services, satellite video services, ITO/BPO/KPO outsourced offshore, etc.