Shang Dynasty's Management of Four Territories in the Middle Times

The middle times is a crucial stage during the historical development of the Shang Dynasty.In this time,the regions had a further expandsion compared to the early times.The Union ended and the relations worsened between the Shang Dynasty and the Foreign Races.The influence of the Shang Dynasty flinched in Jiangsu and Anhui but expanded in the middle reaches of Yangtze River.The culture of the Shang Dynasty spread west and drew back east on the two sides of Weihe River.All these reflected the situations about the managements of the four districts and the amalgamation between the different races in the middle times of the Shang Dynasty.But in the later times,the control of the four districts reduced greatly,which was decided by various reasons.The supposed view made by Mr.Wangyuzhe was that before the King Pangeng Migrated the capital city to Yin,the Shang race was in the transitional stage between the clan system to the slavery system and after the migration,the Shang race strode into the slave society.