Hong Kong activists on Friday made online calls for a march against China's plans to impose national security legislation on the semi-autonomous city which many fear could erode its freedoms and international standing as a global finance hub.
A previous attempt to adopt similar legislation in 2003 was met with a protest that drew around half a million people onto the streets and was eventually shelved.
China's action comes after the large scale and often violent pro-democracy demonstrations in 2019, the biggest crisis the former British colony has faced since it returned to Chinese rule in 1997.