Chinese President Xi Jinping (front, 2nd L) and his wife Peng Liyuan (front, 1st L) watch a performance of Polish folk song and dance with Polish President Andrzej Duda (front, 2nd R) and his wife Agata Kornhauser-Duda (front, 1st R) in Warsaw, Poland, June 19, 2016. [Photo/Xinhua]
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