Tourists play with sea mud at a park in Xiushan Island, Daishan county, east China's Zhejiang province, Friday, July 17, 2009. [Xinhua]
![Tourists play with sea mud at a park in Xiushan Island, Daishan county, east China's Zhejiang province, Friday, July 17, 2009. [Xinhua]](http://images.china.cn/attachement/jpg/site1007/20090718/000cf1a48b7f0bcbb91e30.jpg "Tourists play with sea mud at a park in Xiushan Island, Daishan county, east China's Zhejiang province, Friday, July 17, 2009. [Xinhua]")