China's Xu Xin(Rear, L)/Zhang Jike(Rear, R) compete during the Men's Doubles match against China's Ma Long/Germany's Timo Boll at the 53rd Table Tennis World Championships in Suzhou, city of east China's Jiangsu Province, on April 28, 2015. Xu Xin/Zhang Jike won 4-2. (Xinhua/Yang Lei)