Red river keeps on rolling

One of China's best-loved waterways has had a makeover that's eradicated pollution caused by excessive, unregulated industrial activity and restored its natural beauty. Yang Jun and Zhao Lei report from Renhuai, Guizhou province

Every Chinese person knows that the Chishui River in Guizhou province has two claims to fame: One military, the other cultural.

It's said that 80 years ago, during the Long March, Mao Zedong stood on the banks of the river and stared deep into the wine-red water before giving the order to cross the swollen torrent.