HONG KONG — The photographer Li Zhensheng is on a mission to make his fellow Chinese remember one of the most turbulent chapters in modern Chinese history that the ruling Communist Party is increasingly determined to whitewash.

“The whole world knows what happened during the Cultural Revolution,” Mr. Li said. “Only China doesn’t know. So many people have no idea.”

Clad in a dark blue photographer’s vest, Mr. Li, 78, spoke in a recent interview in Hong Kong, where the first Chinese-language edition of his book “Red-Color News Soldier” was published in July by the Chinese University Press of Hong Kong.

Blending history and memoir, the photo book compiles images taken by Mr. Li in the 1960s when he was working at a local newspaper in northeastern China. Since 2003, the photos have been exhibited in more than 60 countries, bearing witness around the world to the Cultural Revolution — the decade-long turmoil that unfolded from 1966 and turned students against teachers, sons against fathers, and friends against friends.