Over a thousand people turned out in Central on Saturday night for a march to pay tribute to Liu Xiaobo.
The Nobel Peace Prize winner died on Thursday after suffering from liver cancer.
He had been sentenced to 11 years in prison for subversion after calling for an end to one party rule and the recognition of human rights.
Holding candles and white roses, the black-clothed crowd marched from Chater Garden in Central to Beijing's Liaison Office.
They called for mainland authorities to free Liu's wife, Liu Xia.
Former lawmaker Lee Cheuk-yan, from the Alliance in Support of Patriotic Democratic Movements in China, which organised the march, said it is a shame that the Communist Party wants to control Liu Xiaobo even after his death.
He said Liu’s friends were not allowed to attend his funeral. He said Liu Xia was still being held hostage.