Chinese President Xi Jinping (C, front) walks with students as he attends a tree planting activity in Beijing, capital of China, March 29, 2017. China's top leaders Xi Jinping, Zhang Dejiang, Yu Zhengsheng, Liu Yunshan, Wang Qishan and Zhang Gaoli visited east Beijing and planted saplings of different types of trees on Wednesday. (Xinhua/Ju Peng)