Police arrest a Hong Kong protester after a Chinese flag was removed from a flag pole at a Hong Kong rally in support of Xinjiang Uyghurs' human rights in Hong Kong, December 22, 2019. 

Police arrest a Hong Kong protester after a Chinese flag was removed from a flagpole at a Hong Kong rally in support of Uyghurs' human rights, December 22, 2019.
© 2019 REUTERS/Lucy Nicholson