The development of the digital economy has become a new way to respond to the epidemic impact effectively. With the innovative breakthrough of information and communication technology, the digital and real economies are deeply integrated. The digital economy has become an important driving force for the transformation of economic momentum and development. Panel data from 31 provinces in China from 2010 to 2019 were selected for analysis. In the first stage, the study constructed the evaluation index system of digital economy development. Then, the quality development index of the digital economy is calculated by using the entropy method. Finally, the main factors of digital economy development are analysed by spatial measurement. The research results prove that: (1) the development of China’s digital economy in 2010–2019 has gradually increased; (2) the development of the digital economy has a positive correlation between regions and has a spatial spillover effect; (3) the level of economic development, urbanisation, government support, industrial structure, and the level of opening will promote the development of the digital economy.

Against the background of green development, green technology innovation is an important driving force for high-quality economic development. Countries are facing energy shortages, environmental deterioration and other issues that limit high-quality economic development by extending green technology innovation. The study aims to investigate the impact of green technology innovation and its spillover effect on high-quality economic development. For this purpose, the study applies panel data on 30 provinces in China from 2010 to 2019 to construct a spatial Durbin model. The study finds that green technology innovation in the region plays a positive role in promoting high-quality economic development. The findings show that green technology innovation in the Eastern Region could promote high-quality economic development. Nevertheless, the role of the Central and Western Regions is not significant and negative. Green technology innovation in the Central and Eastern Regions shows a significant positive role in promoting the high-quality economic development level of the surrounding areas. However, spillover effects in the Western Region are not obvious.