Poster published in Hong Kong, calling for the release of activists and journalists who participated in the Democracy Movement of 1978-1981 (also called the Democracy Wall movement). They were sentenced to long prison terms in 1982.
On the top row:
王希哲 - Wang Xizhe
傅申奇 - Fu Shenqi
徐文立 - Xu Wenli
何求 - He Qiu