A bloodied shirt, a tent and a military medal are among exhibits marking China’s brutal suppression of 1989 protests.
Ruling also means the song can no longer be disseminated or reproduced on internet-based platforms.
A decade after the Umbrella Movement swept Hong Kong, the streets are silent. But activists say the battle isn’t over.
The law, known as Article 23, has been criticised internationally over fears it could erode civil liberties.