During the 1660's four Manchus dominated the Chinese empire from the court at Peking. These four, Soni, Suksaha, Ebilun, and Oboi, had been appointed in the “Imperial Will” of the late Shun-chih Emperor to serve as Regents during the minority of the K'ang-hsi Emperor. For the first five years of the Regency these Manchus governed collectively. After 1666, however, one of the Regents, Oboi, managed to concentrate power in his own hands and to eliminate the influence of the other Regents. In the years of 1667–69, the young K'ang-hsi Emperor, assisted by his grandmother (the Grand Empress Dowager) and several Manchu advisers, sought to assert personal control over the Ch'ing state and to eliminate the ambitious Oboi. Eventually, in June, 1669, the Emperor arrested Oboi and put an end to his faction of relatives and supporters.