Yang Xuangan
In 613, as Emperor Yang was launching his second campaign against Goguryeo, he put Yang Xuangan in charge of ensuring food supplies at the important shipping junction of Liyang (黎陽, in modern Hebi, Henan). Yang Xuangan withheld the food supply ships, and then, in summer 613, occupied Liyang and declared an uprising, initially declaring that the general Lai Hu'er had revolted and that he was attacking Lai, but soon also declaring that he was restoring the laws of the time of Emperor Wen, signifying a repudiation of Emperor Yang. He soon publicly denounced Emperor Yang of misrule and tyranny, and immediately drew popular support in the region as well as the strongest shipping laborers and sailors. He summoned Li Mi and his brother Yang Xuanting (楊玄挺) from the capital Chang'an, and his brothers Yang Xuanzong (楊玄縱) and Yang Wandan (楊萬石) from the Goguryeo front, but Yang Wandan was captured and executed. Yang Xuangan made Li Mi his chief strategist, and Li Mi gave him three options, in the order of Li's opinion as to their feasibility: