This dynasty stood in the center of Byzantium, a "tumbler" for thousands of years, and was founded by a farmer from the mountainous area of Armenia. It gave full play to the characteristics of Byzantium, reorganized the political structure of the medieval world, and kept the flame of Christian civilization alive under the siege of barbarians. Under its influence, the barbarians in eastern Europe gradually embarked on the road of civilized founding. The Macedonian dynasty, with both Vasily II and Constantine VII, was both a golden age in military politics and a prosperous time in academic culture. Basire, the founder of the dynasty, was a favorite of the Amorite emperor Michael III (reigned from 842 to 867). In 867, he usurped the throne and called himself Basil I. During the Macedonian dynasty, feudalism was formed and the ownership of large land was developing day by day. Free peasants were deprived of their land and went bankrupt and became serfs. Anti-feudal peasant uprisings have occurred constantly, such as the copper hand Vasily uprising in Asia Minor in 928. In order to ensure the source of tax and soldiers, the emperor was forced to issue decrees to help industry and commerce, protect the interests of small farmers and ease contradictions. Basil I promulgated a new code to supplement and update the Justinian code; Rebuild the army, especially the navy, strive to improve the combat effectiveness, launch an offensive against neighboring countries, force the Arabs to retreat, recover Crete and Cyprus, occupy the two river basins and most parts of Syria, and fight the Bulgarians in the north. Byzantium was brought into Slavic countries such as Bulgaria, Serbia and Russia through conquest and missionary activities. Orthodox Church is also widely spread. In the period of Basil II (976 ~ 1025), many laws were issued to restrict feudal lords from annexing land, but they were not effectively implemented. 10 18 conquered the first Bulgarian kingdom that threatened the Byzantine capital Constantinople from the north.