US no longer safe for Chinese to stay, Tsinghua University’s “star” twin scientists sister returning to China at the end of their postdoctoral research in N America was celebrated on Chinese social media after it was announced last week on the alma mater’s website. 美國對中國人來說不再安全，清華大學的「明星」雙胞胎科學家姐妹結束在北美的博士後研究後返回中國，上週在母校網站上宣布這一消息後，中國社交媒體上慶祝了這一消息