Jimmy Lai’s Arrest Signals New Limits for Hong Kong Dissent

HONG KONG—China’s marketing campaign to quash dissent in Hong Kong accelerated with the arrest of professional-democracy media baron Jimmy Lai, sending an ominous sign about the long run of a free of charge press and the new restrictions on those people complicated Beijing’s tightening grip on the former British colony.

Mr. Lai was among the ten swept up Monday, together with Agnes Chow, a 23-year-old politician who is nicely acknowledged for helping to lead professional-democracy protests, in the most recent transfer by authorities to enforce a new nationwide safety legislation imposed by the mainland on Hong…