Xiao Xin (Chinese: 小辛), personal name Zi Song, was a Shang dynasty King of China.
In the Records of the Grand Historian he was listed by Sima Qian as the twentieth Shang king, succeeding his older brother Pan Geng.
He was enthroned in the year of Jiawu (甲午) with Yin as his capital.
[1][2][3] According to tradition, Xiao Xin was the 49th king of China.
Oracle script inscriptions on bones unearthed at Yinxu alternatively record that he was the nineteenth Shang king.