Northern Qi and Northern Zhou Dynasties were countries in the Southern and Northern Dynasties. During the Southern and Northern Dynasties, the Southern Dynasties were changing. The northern dynasties also changed, and no dynasty in the northern and southern dynasties could unify the whole country. After the Northern Wei Dynasty, the Eastern Wei Dynasty and the Western Wei Dynasty coexisted in different places in the Northern Dynasty. When the Eastern Wei Dynasty and the Western Wei Dynasty perished, there were two countries in the Northern Dynasty, namely the Northern Qi Dynasty and the Northern Zhou Dynasty. The order of the Southern Dynasties is Song, Qi, Liang and Chen. Later, the last little emperor of the Northern Zhou Dynasty ceded the throne to his grandfather, Emperor Wendi, and the Sui Dynasty established Emperor Wendi to rule the country.