It was one of the first protests in Hong Kong after a feared national security law came into effect.
Among a dozen or so lunchtime demonstrators at a luxury mall in the Central business district, a man raised a poster that — viewed from afar — read in Chinese, “Liberate Hong Kong, revolution of our times.”
The government had just banned the slogan, saying it had separatist connotations and so ran afoul of the new security law’s prohibition of secessionist acts.
Shortly after, riot police entered the mall, shooing away onlookers. They detained the man, telling him the slogan was banned. But when officers looked at the poster up close, no words could be made out. It merely had circular shapes against a contrasting background. They snapped a few photographs of the poster and let him go.
Read more at. https://wtop.com/asia/2020/07/hong-kong-protesters-adapt-signs-slogans-to-skirt-new-law/