A Hong Kong barrister turned activist on trial for allegedly inciting subversion has accused Beijing of undermining the nation’s constitutional order by entrenching one-party rule, describing the move as a regression. Chow Hang-tung told West Kowloon Court on Monday that mainland China took a step backwards in 2018 by amending the constitution to enshrine the Communist Party’s leadership in its main text at a time when the country was gradually heading towards constitutional democracy. She...