Prince of Yan
In winter 619, Emperor Gaozu created Luo the Prince of Yan Commandery and bestowed the imperial surname of Li on him, and he thereafter became known as Li Yi. Around the same time, he repelled another Dou attack. Dou attacked again in summer 620, and he again repelled the attack, with Gao's aid. Gao thereafter submitted to Tang as well, through him.