The local government is taking steps to clean rivers and investing in advanced treatment facilities to eliminate threats to its water supply, Chen Yingqun and Hao Nan report from Zhangjiagang.

People casually walk down cobblestone streets past fountains, immersed in a world of music while a sweet fragrance hangs in the air.

This is an ordinary evening scene along the Xiaocheng River of Zhangjiagang city, Jiangsu province.