我国是一个历史悠久、幅员辽阔的多民族国家，我们中华民族是世界上唯一具有数千年连续文明发展史的古老民族。由于社会生产力的发展，我国较早地进入了奴隶社会时期、封建社会时期。大约在公元前22世纪末，我国便建立了奴隶制开始形成、发展的夏朝。经过商朝（约前17世纪初─ Our country is a long-established and vast multinational country. The Chinese nation is the only ancient nation in the world with a history of thousands of years of continuous development of civilization. Due to the development of social productive forces, our country earlier entered the period of slave society and feudal society. About the end of the 22nd century BC, China established the Xia Dynasty where slavery began to take shape and develop. After the Shang Dynasty (about the early 17th century ago