2016-06-20T120000Z_594805712_D1AETKZNNFAB_RTRMADP_3_POLAND-CHINA

Photo: Chinese President Xi Jinping (L) and his Polish counterpart Andrzej Duda attend the signing of a cooperation treaty between China and Poland at the Presidential Palace in Warsaw, Poland June 20, 2016. Credit: Agencja Gazeta/Slawomir Kaminski/via REUTERS

Photo: Chinese President Xi Jinping (L) and his Polish counterpart Andrzej Duda attend the signing of a cooperation treaty between China and Poland at the Presidential Palace in Warsaw, Poland June 20, 2016. Credit: Agencja Gazeta/Slawomir Kaminski/via REUTERS