Max Chung , who delivered the application for a letter of no objection from the police , that is required to hold a rally , said : “ We want to show to the public and international community that Hong Kongers , we will never surrender in front of terrorism … To show our solidarity and say no to terrorism , we have to stand up. ” Chung said : “ Yuen Long was under terrorist attack and we have no choice but to take it back. ” The protests , principally over a controversial bill that would allow suspects to be extradited from Hong Kong to mainland China , have taken on new demands , including an investigation into police use of rubber bullets , teargas and physical violence against protesters .