Douyin , operator of the Chinese version of hit short video-sharing app TikTok , said it has taken down more than 3,500 videos and 12,100 comments related to Russia’s invasion of Ukraine , as the war has become a hot topic online in the world’s largest internet market . ByteDance -owned Douyin said it is continuing to investigate violations “such as vulgar ridicule, content that makes fun of the war, incitement to hype false information and unfriendly comments”, the app operator said in a statement on Monday, citing provocative posts like “type ‘Ukraine’ to see explosions effect”. Its action comes…