Tiananmen Square protests and massacre, Chinese media came under tremendous pressure from authorities. Ming Pao reported on the CCP Publicity Department's "hitherto unimaginable extent" of pressure to screen out any related content. The journal reported two incidents in 2008 which caused official concern, but which could not be proven to be deliberate challenges: Beijing News published an image of an injured person being taken to the hospital on 4 June and Southern Metropolis Daily reported on unusual weather in Guangdong province with the headline of "4 storms in June," which both journals insisted were due to carelessness. Some newspapers have therefore instructed their editors to refrain from using the numbers '6' and '4' in their reports during this sensitive period. Furthermore, the numbers cannot be used in the headlines lest the Publicity Department disapprove. 30 journalists and 74 netizens were reportedly imprisoned in China as of September 2014; China had "44 journalists in prison, more than any other country." The CCP also often employs teams of writers () to write articles under pseudonyms for the People's Daily, the official newspaper of the CCP, as well as other journals. These writing teams are most often employed by the Central Propaganda Department, the Central Organization Department, and the Political and Legislative Affairs Committee. The main purpose of these writing groups is to spread the opinions and political thoughts of the CCP without these ideas being perceived as propaganda. Writing teams consistently use the same pseudonyms to write about specific topics that they specialize in. For example, Ke Jiaoping is the pseudonym for a writing group that publishes articles about technological education and He Zhenhua is the pseudonym for a writing group that publishes articles opposing separatism. The CCP punished foreign journalists by failing to renew their credentials when foreign journalists criticized its policies. On 19 February 2020, China announced the revoking of the press credentials of three Wall Street Journal reporters based in Beijing. The government of China accused The Wall Street Journal of failing to apologize for publishing articles criticizing China's handling of the COVID-19 pandemic, and failing to "investigate and deal with those responsible". Television Foreign and Hong Kong news broadcasts in mainland China from TVB, CNN International, BBC World Service, and Bloomberg Television are occasionally censored by being "blacked out" during controversial segments. It is reported that CNN has made an arrangement that allowed their signal to pass through