Riot police entered a shopping centre in Yuen Long, Hong Kong to disperse people on July 21, 2020, after online calls for a demonstration to mark one year since an armed mob beat protesters and commuters at a nearby railway station. Police stopped and searched people at the mall, urging them to leave citing coronavirus social-distancing rules which prohibit public gatherings of more than four people. Some demonstrators held up blank pieces of paper in what was described as a protest against…