A couple wearing Halloween costumes stand on a street in Hong Kong, Thursday, October 31, 2019. AP

A man with a painted face holds signs decrying police brutality in Hong Kong, Thursday, October 31, 2019. AP

A man in a Halloween mask stands next to police officers in riot gear in Hong Kong, Thursday, October 31, 2019. AP

A man dressed as Joaquin Phoenix's Joker walks past police officers in riot gear in Hong Kong, Thursday, October 31, 2019. AP

A man in a Halloween costume walks past police officers in riot gear in Hong Kong, Thursday, October 31, 2019. AP

A man dressed as a dinosaur stands in the Mid-Levels area in Hong Kong, Thursday, October 31, 2019. AP

People in Guy Fawkes masks raise their hands as they gather on a street in Hong Kong, Thursday, October 31, 2019. AP

Police officers in riot gear gather on a street in Hong Kong, Thursday, October 31, 2019 AP

A man wearing a mask of Chinese President Xi Jinping stands with peole wearing Guy Fawkes masks on a street in Hong Kong, Thursday, October 31, 2019. AP