An exhibition to mark the fifth anniversary of the 2014 Occupy movement opened in Mong Kok on Friday.
The pro-democracy movement started on September 26 of that year and lasted for 79 days when students occupied Harcourt Road near government headquarters in Admiralty.
The organiser of the exhibition, the Hong Kong Alliance in Support of Patriotic Democratic Movements of China, said the aim of their work is to encourage Hong Kong people to continue their fight for democracy.
The alliance's Mak Hoi-wah said the mass protests five years ago "sowed seeds" in young people, making them more concerned about society, and this year's anti-extradition protests are a sequel to the Occupy movement.
He said this is why it's important to remember what happened.
The exhibition features display boards detailing the movement's development, as well as paintings, posters and a virtual-reality headset showing a video of the protests.
There will also be movie screenings and a seminar featuring Professor Benny Tai, one of the Occupy co-founders.
The exhibition in the alliance's June Fourth Museum will be open until the end of November.