Close to a thousand protesters wearing face masks and eye patches sat in Sydney's Martin Place in "a silent assembly" to show solidarity with Hong Kong on Friday night.

The group constructed a Lennon wall on the back of the Martin Place fountain, sticking up coloured post-it notes, images of injured Hong Kong protesters and messages of solidarity.

Protesters hold pro-Hong Kong signs at the 'Stand With Hong Kong' rally at Martin Place on Friday night. Credit:James Brickwood

One protester told the crowd: “We will not be divided. We are all in this fight for Hong Kong together. This is our time for revolution.”

Karen, who wore a face mask and did not want to give her last name for fear of being identified, said she wanted to show Hong Kong protesters that “they are not alone.”