Citizens release fish to Dianchi Lake in Kunming, southwest China's Yunnan Province, Nov. 20, 2011. Some 100,000 fish were freed here in the hope of protecting the ecosystem and improving the water quality in the lake.

Citizens buy fish fries for release beside Dianchi Lake in Kunming, southwest China's Yunnan Province, Nov. 20, 2011. Some 100,000 fish were freed here in the hope of protecting the ecosystem and improving the water quality in the lake.

Children release fish to Dianchi Lake in Kunming, southwest China's Yunnan Province, Nov. 20, 2011. Some 100,000 fish were freed here in the hope of protecting the ecosystem and improving the water quality in the lake.