(Repeats story first published on Thursday) By Eduardo Baptista BEIJING, March 10 (Reuters) - China's censors, who quietly determine what can be discussed on the country's buzzing social media platforms, are silencing views of citizens protesting against Russia's invasion of Ukraine. In the days after Russia's Feb. 24 attack, comments on Chinese social media platforms Weibo, WeChat and Douyin broadly backed Russia and President Vladimir Putin. Many posts challenging that, or even advocating peace, quickly disappeared from view. Jin Xing, a former popular talk show host and China's first openly transgender celebrity, told Reuters her account on Weibo - China's...