Expert: People forget pain, move into danger

Millions of residents have returned to areas along the Yangtze River used for water retention

A leading expert on the Yangtze River is warning of potential danger as China battles flooding along its longest river.

Chen Jin, vice-dean of the Yangtze River Scientific Research Institute, said that people have moved back into some flood retention areas in the Yangtze River Basin after an unprecedented disaster in 1998 drove them out.