Hong Kong on Wednesday marked the 23rd anniversary of its return to Chinese rule, one day after China imposed a sweeping national security law on the former British colony, with police arresting more than 300 protesters.The theme of national security reverberated throughout celebratory events and protests, as Hong Kongers digested the law's impact on their lives and the future of the territory."It is a day of great historical significance," Chief Executive Carrie Lam told guests at an anniversary reception, calling the law's enactment "a turning point to take Hong Kong out of the current im…READ FULL ARTICLE