Simplified Chinese exclusively, and the Classical Chinese Wikipedia uses Traditional Chinese exclusively (The Gan and Cantonese Wikipedias default to Traditional, but have a conversion function similar to the Chinese Wikipedia). The Min Nan Wikipedia uses Pe̍h-ōe-jī. The Mindong Wikipedia and Hakka Wikipedias currently use Bàng-uâ-cê and Pha̍k-fa-sṳ respectively, which can be converted to Traditional Chinese characters, thus avoiding the issue completely. 2021 Wikimedia action Wikimedia revoked access of seven editors and downgraded the privileges of 12 Mainland-based administrators on 16 September 2021 over "infiltration concerns." It was alleged that an unrecognized group of Mainland China editors, with approximately three hundred members, had been involved in vote-stacking and manipulation of administrative elections. The Wikimedia Foundation said that they took action based on "credible threats” to volunteer safety. Several of the affected members denied wrongdoing in subsequent interviews and writings. The affair caused significant controversy on Chinese Wikipedia, and also drew critical commentary from Chinese media, where Wikipedia is rarely discussed. Blocking of Wikipedia The People's Republic of China and internet service providers in Mainland China have adopted a practice of blocking contentious Internet sites in mainland China, and Wikimedia sites have been blocked at least three times in its history. On 19 May 2015, Chinese Wikipedia was blocked again within mainland China. Because all Wikipedias rely on HTTPS links, Chinese censors cannot see what page an individual is viewing; this also makes it more difficult to block a specific set of pages. First block The first block lasted from 2 – 21 June 2004. It began when access to the Chinese Wikipedia from Beijing was blocked on the 15th anniversary of the 1989 Tiananmen Square protests. Possibly related to this, on 31 May an article from the IDG News Service was published, discussing the Chinese Wikipedia's treatment of the protests. The Chinese Wikipedia also has articles related to Taiwan independence, written by contributors from Taiwan and elsewhere. A few days after the initial block of the Chinese Wikipedia, all Wikimedia Foundation sites were blocked in mainland China. In response to the blocks, two moderators prepared an appeal to lift the block and asked their regional internet service provider to submit it. All Wikimedia sites were unblocked between 17 and 21 June 2004. One month later, the first Chinese Wikipedian moderators' meeting was held in Beijing on 25 July 2004. The first block had an effect on the vitality of the Chinese