Gee: find the spatial distribution and corresponding time of the "greenest" in the Yellow River Basin in 2020 [pixel by pixel analysis]

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Preface

utilize GEE, How to find the Yellow River Basin 2020 year “ Greenest ” Space and corresponding time 【 Pixel by pixel analysis 】？

For the relevant analysis of the Yellow River Basin, see ：
GEE： Explore the Yellow River Basin 10 Characteristics of vegetation changes over the years 【 Pixel by pixel analysis 】
GEE： Explore the Yellow River Basin 10 Characteristics of precipitation changes in recent years 【 Pixel by pixel analysis 】

The areas for this analysis are as follows ：