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Czech National flags hang next to Chinese National flags splattered with a black substance in Prague on March 26, 2016 Dozens of Chinese flags that had been hung up in the streets of Prague ahead of a landmark visit by Chinese President Xi Jinping were defaced overnight police said. / AFP / Michal Cizek (Photo credit should read MICHAL CIZEK/AFP/Getty Images)

Czech National flags hang next to Chinese National flags splattered with a black substance in Prague on March 26, 2016
Dozens of Chinese flags that had been hung up in the streets of Prague ahead of a landmark visit by Chinese President Xi Jinping were defaced overnight police said. / AFP / Michal Cizek        (Photo credit should read MICHAL CIZEK/AFP/Getty Images)