Final answer:
The process of expanding and controlling the peninsula took several centuries, involving trade, migration, assimilation, and administrative structures.
Step-by-step explanation:
The process of expanding and controlling the peninsula took place over a significant period of time. The commanderies were set up in the northern peninsula in 108 BC, and two of them lasted only 25 years. Lelang became the center of trade and it formed a Yellow Sea trading circuit that ran from the southern peninsula to Manchuria, across the mainland and the steppe route to the Middle East and Europe, and over to the archipelago and southeast Asia.
Over time, the control of the peninsula involved the appointment of officials by the central government, local staff members for registration, tax collection, and labor service. The local population was given preferential treatment to ensure acceptance of the new government. Over several hundred years, mainlanders intermarried with the local elite families, leading to the assimilation of Chinese culture.
The process of expanding and controlling the peninsula was a gradual one, involving trade, migration, assimilation, and the establishment of administrative structures. It spanned several centuries and involved different dynasties and their methods of control.