Posing as a scholar, a Chinese woman spent years writing alternative accounts of medieval Russian history on Chinese Wikipedia, conjuring imaginary states, battles, and aristocrats in one of the largest hoaxes on the open-source platform. “The content she wrote is of high quality and the entries were interconnected, creating a system that can exist on its own,” veteran Chinese Wikipedian John Yip told VICE World News. “Zhemao single-handedly invented a new way to undermine Wikipedia.”
https://www.vice.com/en/article/pkgbwm/chinese-woman-fake-russian-history-wikipedia