On 18 August 2017, following an "instruction" from a Chinese import agency, Cambridge University Press used the functionality that had been built into Cambridge Core to temporarily delete politically sensitive articles from "The China Quarterly" on its Chinese website. The articles focused on topics China regards as taboo, including the 1989 Tiananmen massacre, Chairman Mao Zedong’s Cultural Revolution, Hong Kong's fight for democracy and ethnic tensions in Xinjiang and Tibet.