杨玄感
Undeterred, Emperor Yang launched a second campaign against Goguryeo in 613, even though the agrarian rebellions were becoming more numerous and serious. He again headed for Liaodong himself and put it under siege, while sending Yuwen Shu with another general Yang Yichen toward Pyongyang. While he was sieging Liaodong, the northern Chinese general Yang Xuangan, in charge of logistics near the Sui eastern capital Luoyang, rebelled and attacked Luoyang. When Emperor Yang heard the news, he withdrew his forces and sent Yuwen and Qutu Tong back to Luoyang ahead of himself, and Yuwen and Qutu joined with Fan Zigai (樊子蓋) and Wei Wensheng (衛文昇), the commanders of forces that Emperor Yang had left at Luoyang and Chang'an respectively, to defeat Yang Xuangan. Emperor Yang carried out heavy-handed reprisals against actual or perceived adherents of Yang Xuangan, but such actions did not deter further rebellions.