Over 500,000 Nanjingers now see cycling as a kind of spiritual enjoyment. The trails, called “See the Mountain”, “See the Lake”, “See the River” and “See the Forest” are a reflection of Nanjing’s PM2.5 levels dropping by 62.8 percent since 2013. Full story (in Chinese) via this link; read about Nanjing introduced as never before via this link.