Construction of online "single window" platform in Hefei Comprehensive Test Area: strengthening information interconnection, establishing enterprise and commodity information base; establishing off-line integrated park platform: building "one nuclear three zones" and promoting multi-zone linkage development; optimizing cross-border e-commerce regulatory services: comprehensively promoting facilitation of customs clearance mode, establishing negative list regulatory system, establishing product quality regulatory system; enhancing cross-border e-commerce financial services: developing cross-border e-commerce financial innovation business, optimizing foreign exchange management system