There was another side of the story. Another video of this particular event shared among Mainland Chinese students showed that the HK students picked fight firs

There was another side of the story. Another video of this particular event shared among Mainland Chinese students showed that the HK students picked fight first and one female HK side student faked fall to ground after the Mainland side tried to push her away gently. Chinese students were angered by the selective coverage by BBC. BBC was also criticized for its selective coverage of HK protect that became riot. The most criticized case was a video showing a police officer pointing a short gun at protesters. There was a few minutes of video before that showing mobs attacked and beaten some police officers then this particular officer loaded the shotgun with rubber bullets. HK protect started peacefully now turned into riot with no clear political purpose. The extradition bill is dead already. I haven't heard any clear political demand from those protesters afterwards. It could hardly be called pro-democracy demonstration now.