Pro-China accounts have been flooding Twitter with messages that include the hashtag #GenocideGames, in what researchers say is an effort to dilute the hashtag’s power to galvanize criticism of the Winter Olympics host nation. Human-rights advocates and Western lawmakers have used the #GenocideGames hashtag to raise awareness about Xinjiang , a region in northwestern China where authorities have conducted forcible assimilation efforts against religious minorities, including Uyghur Muslims. Xinjiang has become a focal point for critics of China’s policies ahead of the Beijing Winter Olympics, which began last week.