A filthy river in Rui'an city, East China's Zhejiang province, is pictured on the Feb 18, 2013 photo. The chairman of a glasses store in the province's capital city Hangzhou, has offered 200,000 yuan ($32,000) to the head of the local environmental protection bureau to swim in this filthy river for 20 minutes. [Photo by Zheng Tao/Asianewsphoto]