With the mission of serving the national strategy of the "the Belt and Road" and exploring the formulation of "new trade rules", DBB (Document bill bit) has gradually formed a set of management systems and rules that adapt to and lead the development of global cross-border e-commerce through cross-border trade in terms of technical standards, business processes, regulatory models, information construction, tax rebates, foreign exchange settlement and other aspects, Seize the commanding heights and voice of global cross-border e-commerce development....