A tourist shows a newly-caught fish during a dredging festival at the Xixi National Wetland Park in Hangzhou, East China's Zhejiang province, Dec 4. The dredging festival has been held at the wetland park recently. During the festival, water will be drained and silt in ponds will be dredged, so as to build a better environment. [Photo/zjol.com.cn]

Tourists catch fish during a dredging festival at the Xixi National Wetland Park in Hangzhou, East China's Zhejiang province, Dec 4. [Photo/zjol.com.cn]

Tourists catch fish during a dredging festival at the Xixi National Wetland Park in Hangzhou, East China's Zhejiang province, Dec 4. [Photo/zjol.com.cn]