Opposition activist Joshua Wong was arrested over illegal assembly last October and the anti-mask law, which bans people from covering their faces during protests. He spread the news of his arrest via Twitter. Veteran social activist Koo Sze-yiu was also detained in connection with the incident. Referring to a rally planned for National Day, Wong said, ‘The government wants to produce a chilling effect on Hong Kong people in order to frighten people away from the 1 October march. I will continue to resist, and we should also let the world know Hong Kong people will not easily surrender. They can’t censor our commitment to fight for freedom. The chilling effect will not work and is not the way out.’ It is the third time he has been prosecuted since June.