Xiamen is an important birthplace and first practice place for Xi Jinping’s ecological civilization thought. The story stems from the clarification of a pair of incomprehensible relationships: Which is more important, economic development or nature protection? Behind it is the eternal theme of the development of human society - the game of the relationship between man and nature.

In the practice of Xiamen that created the "Ludao Butterfly Transformation", three sets of keywords are inseparable. After years of treatment, Yuandang Lake, which used to have sewage flowing across the river and litter everywhere, has been transformed into a "green lung of the city"