life. After Chen was conquered, Sui began to apply its laws over Chen's former territory—which brought resentment from the gentry, as they had been treated preferentially under Chen and its predecessor dynasties in the south. Su Wei further wrote a work known as the Five Teachings (五教, Wu Jiao) which is no longer extant but thought to be a work about loyalty to Sui and ordered that all former Chen subjects read and memorize it, leading to further resentment. When a rumor spread that Sui would move Chen subjects into the Guanzhong region in 590, nearly all of former Chen realm rose in rebellion, but in an unorganized manner. Emperor Wen sent Yang Su to quell the rebellions, and the rebels were no match for Yang Su; within the year, the rebellions were put down. In 591, Tuyuhun sought peace and, as per custom, its khan Murong Shifu () offered his daughter to be a concubine for Emperor Wen. Emperor Wen accepted the peace offer but declined the offer of Murong Shifu's daughter. (It was, however, around this time that he did take Chen Shubao's sister and another woman from Jiankang, Consort Cai, as concubines, although it appeared likely that Consort Cai was never able to have sexual relations with Emperor Wen while Empress Dugu was alive; Consort Chen, as the sister of a submissive former sovereign, might have had sexual relations with Emperor Wen on an infrequent basis, but it is not clear.) In spring 592, the official He Tuo (), who, despite his senior status over Su Wei's son Su Kui (), was losing out against Su Kui over a debate as to the designation of official music styles for Sui. In anger, He Tuo accused Su Wei of factionalism, and after investigation by Emperor Wen's son Yang Xiu and the official Yu Qingze (ted zhang), Su Wei was removed from office. After Su Wei's removal, Yang Su and Gao Jiong became effectively the co-prime ministers. When Heruo Bi, who believed that he should have been prime minister, complained, Emperor Wen removed him from his post as well and stripped him of his ducal title, but restored the ducal title a year later. (Su Wei, however, was back in his post at the latest by 595.) Also in 592, Emperor Wen, reacting to an overflowing abundance of food and silk in the governmental stores, reduced the taxes heavily,