Cao Shuang
Xin Xianying's younger brother Xin Chang served as an adviser to the Wei general Cao Shuang, who served as regent to the third Wei emperor Cao Fang. On 5 February 249, when Cao Shuang accompanied Cao Fang on a visit to the Gaoping Tombs, his co-regent Sima Yi took advantage of his absence to stage a "coup d'état" and seize control of all the armed forces in the imperial capital Luoyang. Lu Zhi (魯芝), a major under Cao Shuang, prepared to lead his men to fight their way out of Luoyang and regroup with Cao Shuang. When Lu Zhi asked Xin Chang to follow him, a fearful Xin Chang turned to his sister for advice: "The Emperor is away. The Grand Tutor (Sima Yi) has ordered the city gates to be shut. People say that this won't be of any good to the State. What do you think will happen?"