June 4 vigil is Hong Kong’s canary in a coal mine. Will it survive Beijing’s national security law?

• The candlelight vigil marking the 1989 Tiananmen crackdown, a bellwether for Hong Kong’s freedoms, is banned this year. Will it ever return?
• The city’s response to the crackdown was seen as subversive and prompted Beijing to adopt a more hardline approach to the drafting of the Basic Law. Those effects are still being felt today