A teacher gives a lesson to students at Yongxing School on Yongxing Island of Sansha City, south China's Hainan Province, Dec. 31, 2019. Located in China's southernmost island province of Hainan, Yongxing School was opened in December 2015. The school offers classes from kindergarten through third grade. Sansha City on Yongxing Island, one of the Xisha Islands in the South China Sea, was founded in July 2012. (Xinhua/Pu Xiaoxu)