WUHAN, May 16 (Xinhua) Bao Manzhu, a professor of forestry, is intently observing a verdant tree sapling in his planetree breeding base at Huazhong Agricultu
© Provided by Xinhua SHENYANG, June 22 (Xinhua) In the morning, Li Guohui, 66, picked up sundry sensors and artificial joints, and deftly assembled