Emperor Yang sent his cousin Yang Xiong (楊雄) the Prince of Ande and Yuwen Shu the Duke of Xu to escort Murong Fuyun.
Emperor Yang's main forces put Goguryeo's key northern city Liaodong (遼東, in modern Liaoyang, Liaoning) under siege (although he was ultimately unable to capture it), but sent Yuwen with a branch army to head deep south, across the Yalu River, heading directly toward the Goguryeo capital Pyongyang.
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Emperor Yang personally led part of the army to put the important city Liaodong (遼東, in modern Liaoyang, Liaoning) under siege, while he sent the generals Yuwen Shu and Yu Zhongwen (于仲文) to lead the rest of the army deep into Goguryeo territory, heading toward the Goguryeo capital Pyongyang, joined by the fleet commanded by the general Lai Hu'er (來護兒).