This document, declassified in January 2015, contains a 1989 diplomatic memorandum from the Canadian Embassy in Beijing. It describes the circumstances surrounding the June 4 massacre as they were known to officials at the Canadian embassy.
The documents, declassified by the National Library and Archives of Canada, show the Canadian government's concern about the invasion of the embassy by Chinese troops. The documents also describe the crackdown in Beijing and how the troops killed citizens.
The author of this book, Wang Nianyi (1932 - September 13, 2007), was an expert on the history of the Cultural Revolution. He has a clear understanding of the causes and circumstances of the Cultural Revolution. He is regarded as doing "pioneering work" in China's domestic study of the Cultural Revolution. According to Qizhi's recollection, Wang Nianyi compiled <i>Chronicle of the Cultural Revolution</i>, <i>The First Year of the Cultural Revolution</i>, <i>Dictionary of the Cultural Revolution</i>, <i>Miscellaneous Discourses on the Cultural Revolution</i>, and <i>Research Materials on the Cultural Revolution</i>, which have not been published in China.
Wang Nianyi is an expert on the history of the Cultural Revolution in China. Early on, he suggested that Lin Biao's defection was forced by Mao Zedong. This has long been considered a taboo view in China.