…Li Mi, having been defeated earlier in the year in a surprise attack by the Sui general Wang Shichong, flees to Tang territory and submits to Gaozu.

Li Mi's general Xu Shiji, who controls a major part of Li Mi's former territory, also submits, and Emperor Gaozu, impressed with Xu's faithfulness to Li Mi, bestows the imperial surname of Li on Xu.

Gaozu creates Li Mi the Duke of Xing, but only makes him the Minister of Feasts, a post that Li Mi views as below his stature.

Around New Year 619, Li Mi requests Emperor Gaozu's permission to head east to persuade some of his former subordinates to submit to Tang, but once he leaves Chang'an, plans to restore his independence.

He is ambushed and killed by the Tang general Sheng Yanshi.