TOPSHOT - A policeman fires tear gas to disperse protesters after a march against a controversial extradition bill in Hong Kong on July 21, 2019. - Masked protesters daubed the walls of China's office in Hong Kong with eggs and graffiti on the night of July 21 following another massive rally, focusing anger towards the embodiment of Beijing's rule with no end in sight to the turmoil engulfing the finance hub. (Photo by Anthony WALLACE / AFP)