(January 16, 2001) Although he lives beside the Yellow River, China’s second longest and popularly known as China’s Mother river, Du Ping is very concerned about water supply, which was the cause in a drop of his income last year. The farmer in Chongxing Town, northwestern China’s Ningxia Hui Autonomous Region, used to plant rice on his third of a hectare farm, but switched to maize last year as it requires less water.