Chinese President Xi Jinping (2nd R, front) waters a sapling with a student during a tree-planting event in Xihongmen Township of Daxing District in Beijing, capital of China, April 5, 2016. Top leaders Xi Jinping, Li Keqiang, Zhang Dejiang, Yu Zhengsheng, Liu Yunshan, Wang Qishan and Zhang Gaoli attended a voluntary tree-planting in Beijing on Tuesday. (Xinhua/Li Xueren)