Taking shelter under a tree from a midday cloudburst, he puffs on his bamboo water pipe and explains how the economics of tilapia have suddenly turned against him.

According to the synthetic energy price defined, analyses the main factors of effecting solar water heaters economics by the method of comparison with corresponding general water heaters.

The experience of vitalizing economics by way of soliciting business affairs and inviting investment to turn the water-power resources into pillar industry in Hefeng County is described.