In June 1989, the Chinese government launched a crackdown on protesters in Tiananmen Square, Beijing. It was a brutal response to a peaceful movement for political and economic reform across China.

To this day, no one knows how many were killed, but estimates are in the thousands. China continues to erase all memory of those events from national history - both within the country and beyond its borders.

On the anniversary of the Tiananmen Square massacre, Boundaries of Expression assesses the legacy of the crackdown and the impact of a generation of censorship in a conversation with human rights activist Fengsuo Zhou, a student leader of the protests 35 years ago, and Michael Caster, Asia Digital Programme Manager, ARTICLE 19.

Presenter: Jo Glanville

Producers: Michael Caster and Jo Glanville

Studio manager: Aamir Yaqub

Mixed by Julian Wharton and recorded at Bison Studios, London

Archive: CNN

Tune in to hear personal stories, historical insights, and a call to action for defending human rights and freedom of expression.