The Hukou Waterfall on the Yellow River, once depicted on China’s fourth-series 50-yuan banknotes as a torrent of muddy, turbulent water, now presents a markedly different scene, with its cascading waters running clear. Photographer Lyu Guiming, known for documenting the waterfall in Jixian County, north China’s Shanxi Province, since 1999, has witnessed the change. “Over
