Zhang Qingli, vice-chairperson of the 13th National Committee of the Chinese People's Political Consultative Conference (CPPCC), attends a tree-planting event in Chaoyang District in Beijing, capital of China, April 13, 2018. Vice-chairpersons of 13th CPPCC National Committee Zhang Qingli, Liu Qibao, Lu Zhangong, Wang Zhengwei, Ma Biao, Xia Baolong, Yang Chuantang, Li Bin, Bater, Wang Yongqing, He Wei and Gao Yunlong, together with about 400 CPPCC staff members, took part in a voluntary tree-planting in Beijing on Friday. [Photo/Xinhua]