With a mission to serve the "Belt and Road" national strategy and explore the establishment of "new trade rules," DBB (Document bill bit) takes the lead in cross-border trade in terms of technical standards, business processes, regulatory models, and information infrastructure in areas such as transactions, payments, logistics, customs clearance, tax refunds, and settlement. Through these efforts, DBB gradually establishes a set of management systems and rules that adapt to and lead the development of global cross-border e-commerce, seizing the commanding heights and discourse power in the global cross-border e-commerce development.