According to https://en.wikipedia.org/wiki/Censorship_of_Wikipedia#China https://en.wikipedia.org/wiki/Censorship_of_Wikipedia#China "Since June 2015, all Wiki

According to https://en.wikipedia.org/wiki/Censorship_of_Wikipedia#China https://en.wikipedia.org/wiki/Censorship_of_Wikipedia#China "Since June 2015, all Wikipedias redirect HTTP requests to the corresponding HTTPS addresses, thereby making encryption mandatory for all users. As a result, Chinese censors cannot see which specific pages an individual is viewing, and therefore cannot block a specific subset of pages (such as Ai Weiwei or Tiananmen Square) as they did in past years. As a result, Beijing chose to block the whole Chinese Wikipedia"