Tang Ngok-kwan still occasionally visits the places where Hong Kong once publicly remembered Beijing’s 1989 Tiananmen Square crackdown.Though Tang's fellow activists were locked up in prison, accused of inciting subversion, and an annual candlelight vigil they previously organized to mourn the crackdown's victims vanished, the 58-year-old continues to personally and discreetly remember the event, which is a political taboo on mainland China.At Victoria Park, where tens of thousands of people once gathered for the only large-scale public commemoration of the crackdown in China, Tang bowe…READ FULL ARTICLE