"Li Peng's June 4 Diary" was published by Bao Park, the son of Bao Tong, the political secretary of former CCP General Secretary Zhao Ziyang. Based on a manuscript of a diary allegedly kept by Li Peng during the June 4 Tiananmen Square incident, the book was originally scheduled to be published in Hong Kong by New Century Press on June 22, 2010. At the time of the June 4, 1989 Tiananmen Square incident, Li Peng was a member of the Standing Committee of the Political Bureau of the Communist Party of China Central Committee (CCP Central Committee) and the Premier of the State Council. The diary covers the period from April 15, 1989 to June 24, 1989, when Li Peng was a member of the Politburo Standing Committee and Premier of the State Council. Bao Park said that, apart from converting the diary from the original simplified Chinese characters to traditional Chinese characters, "nothing will be added, nothing will be subtracted, and nothing will be changed" in the book. The book was later published in the United States.