The Shuangshan Island is located in Zhangjiagang, a county-level city in Suzhou, East China's Jiangsu province. It is one of the islands in the middle and lower reaches of the Yangtze River that has a pristine ecosystem. [Photo/zjgonline.com.cn]

An aerial view of people camping at Shuangshan Island. [Photo/zjgonline.com.cn]

Wild birds on the beach at Shuangshan Island. [Photo/zjgonline.com.cn]