a positive trendgold
4.2.2 Dynamic evolution characteristics of coupling types From 2001 to 2020, the coupled development between urbanization and the eco-environment in the Chengdu-Chongqing urban agglomeration showed a positive trend, gradually transitioning from a state of coexistence between disorder and low stability to a state of coexistence between low and medium stability, and further to a state of coexistence between low, medium, and high stability.