The greenery in question appears to be a tidal estuary (but I'm not 100% sure) and it also appears to be close to the downtown center of a city of 4 million people who all need some amount of electricity to live their daily lives. The ecosystem of the body of water on which these panels are installed is I would imagine relatively undisturbed by the solar PV - it's a question of aesthetics whether or not this habitat has been degraded.
My feeling is that these over-water panels generating a not-insignificant amount of power are an ideal compromise between the sprawl of the built environment of (Taizhou, China) and the natural ecosystem.