Table 2. The index system of the regional digital economy.

Dimensions	Primary Indicators	Secondary Indicators	Symbol
The Digital Economy	Digital Foundation (0.2166) a	Number of Mobile Phone Base Stations	+
		Internet Broadband Access Port	+
		Mobile Phone Penetration	+
	Digital Industry (0.2815)	Investment in Fixed Assets of Electronic Information Manufacturing	+
		Software Product Revenue Scale	+
		Information Technology Services Revenue	+
		Volume of Telecommunication Service	+
	Digital Integration (0.2888)	Proportion of Enterprises Engaged in E-commerce Transactions	+
		E-commerce Sales	+
		Digital Financial Inclusion Index	+
		Online Government Service Capability Index	+
	Digital Innovation (0.2131)	Number of Patent Applications Granted	+
		Number of High School Students	+
		Number of R&D Projects of Industrial Enterprises Above Designated Size	+

^a The indicator weight calculated by the entropy weight method.