Xi Jinping (front) waters a maidenhair tree together with a pupil during a tree-planting event in Fengtai District in Beijing, capital of China, April 2, 2013. Chinese top leaders Xi Jinping, Li Keqiang, Zhang Dejiang, Yu Zhengsheng, Liu Yunshan, Wang Qishan and Zhang Gaoli joined in the tree planting event here on Tuesday. (Xinhua/Ju Peng)