Residence permit cards are issued to residents in Sansha city, South China's Hainan province, July 17, 2013. The first batch of 10 identification cards and 68 residence permit cards are being issued to Sansha residents one year after its establishment. As China's youngest city, Sansha was officially set up last July on Yongxing Island in the South China Sea. The city administers three island groups - Xisha, Zhongsha and Nansha - and the surrounding waters in the South China Sea. [Photo/Xinhua]