Dynamic Evolution, Regional Differences, and Spatial Spillover Effects of Urban Ecological Welfare Performance in China from the Perspective of Ecological Value.

However, there is a significant trend of increase after 2019 ( Figure 5 ).

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In the available studies, the overall EWP shows a decreasing trend in the time series [ 2 , 22 ].

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The western region’s value does not change much in the early period and has an increasing trend in fluctuation in the later stage, indicating that the gap decreases later.

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