Research on high-quality economic development in Tianjin

This paper selects development indicators of primary industry, secondary industry, and tertiary industry, as well as indicators of public lifestyle, to measure the impact of economic development and general public lifestyle on the environment. A grey relational degree model is used to analyse Tianjin's evolving characteristics from 2000 to 2020 on the balanced development of the economy and environment. The results suggest that: Firstly, Tianjin's overall coupling degree between economic growth and environmental change varies from 0.56 to 0.75, which is at a moderate coordination level, and the degree of coordination between tertiary industry and environment is high. Secondly, taking time as the axis, the relational degree is significant between economic growth and environmental change. From 2015 to 2020, the synergy between the development of the secondary industry and the environment declined, indicating that the development of the secondary sector has caused some environmental destruction. On these grounds, Tianjin should give full play to its traditional advantages and comparative advantages, lay emphasis on the optimisation and upgrading of its industrial structure in the process of continuously deepening the integration of Beijing-Tianjin-Hebei, promote the deep integration of manufacturing and service industry, and boost the quality its economic development.