Poster for a documentary movie on the People's Liberation Army Navy, made by the August One Film Studio (Bayi dianying zhi pian chang - 八一电影制片厂摄制) and released in 1968.
The text in the picture: Highest Directive: In order to oppose imperialist aggression we must build a strong navy (Zuigao zhishi - Weile fandui diguo zhuyì de qinlüe women yiding yao jianli qiangda di haijun - 最高指示 - 为了反对帝国主义的侵略我们一定要建立强大的海军).