HKer peacefully sang "Glory to Hong Kong" and was expelled by the security police, which triggered a chorus of people.

https://video.wixstatic.com/video/253361_845fed3e4c184abebd48382475c0e730/360p/mp4/file.mp4

https://video.wixstatic.com/video/253361_8e5bdf7342974785a851130c30dfdf41/360p/mp4/file.mp4