Barely Significant

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The internal difference in synergy of LX gradually decreased, and, from 2007 to 2020, the Gini coefficient decreased from 0.249 to 0.045, first showing an increasing trend with fluctuations and then a decreasing trend.
As seen in Figure 7 c, the abrupt change test is broken at the Takamura station from 1973–1983 and 1990–2021, indicating a significant trend of decreasing runoff during that period, and the existence of an abrupt change point in 1973, indicating an abrupt change in runoff in 1973.
The overall trend of change in the environmental performance indicator of the Chengdu-Chongqing region from 2011 to 2020, given in Figure 3 , shows that: between 2011 and 2015, the environmental performance indicator of Chengdu City grew at a relatively slow pace, and although there was a decline in 2014, it did not fall below the environmental performance indicator of 2011, and still showed an overall trend of growth.