Zhao Xin (simplified Chinese: 赵信; traditional Chinese: 趙信; pinyin: Zhào Xìn; Wade–Giles: Chao Hsin) was a prominent Xiongnu general in the late 2nd century BCE during the Han–Xiongnu War.
In 131 BCE, Zhao Xin defected from the Xiongnu to the Han,[2] and he became known as the Marquis of Xi (Chinese: 翕侯).
[4] In 119 BCE, Zhao Xin is recorded as acting on behalf of the Xiongnu to broker a heqin marriage with the Han.
[5] A Xiongnu fortress named after Zhao Xin was constructed near the Khangai Mountains, soon after his submission to Yizhixie Chanyu.
The fortress was later destroyed by Wei Qing's forces during the end phase of the Battle of Mobei.