Liu Wuzhou
Emperor Gaozu put Qin Shubao under Li Shimin's command. Around the new year 620, with Liu Wuzhou the Dingyang Khan having seized most of Tang territory in modern Shanxi and aiming to attack further south, Emperor Gaozu sent Li Shimin to resist Liu, and Qin and Yin Kaishan () were able to defeat Liu's general Yuchi Gong at Meiliang River (美良川, flowing through modern Yuncheng, Shanxi), repelling Yuchi's offensive. Impressed, Emperor Gaozu sent a messenger to award Qin a golden bottle, stating to him: