China's economy has experienced phenomenal growth over the past few decades. However, energy dilemmas, environmental pollution, and the greenhouse effect arise over time [1]. Based on the profound changes in China's economic development environment, the 19th National Congress pointed out that China's economy "has shifted from a stage of high-speed growth to a stage of high-quality development". High-quality development is the fundamental embodiment of the new development concept of innovation, coordination, greenness, openness, and sharing [2,3]. China is a vast country with significant heterogeneity in geographical location, resource endowment, and economic base. Narrowing regional differences and achieving regional balance is a challenge for high-quality development. Therefore, exploring regional differences is a prerequisite for promoting regional collaborative high-quality development.