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Optimizing the cross-border e-commerce supervision process through dual-code traceability is 军中简谱科金博just a microcosm of Chongqing Customs' use of digital technology to innovate supervision services and build a green channel for cross-border e- commerce business . As a new form of foreign trade, the vigorous development of cross-border e-commerce is inseparable from the continuous optimization of the port business environment by the customs department and the improvement of the modernization level of governance capabilities.