Final answer:
True, the Longshan people created an extended region with common culture and trade networks when they migrated and settled new lands in southern China. They were productive farmers and had a significant impact on the development of Chinese culture.
Step-by-step explanation:
True, when the Longshan people migrated and settled new lands in southern China, they created an extended region linked by common culture and trade networks. The Longshan culture was composed of multiple Neolithic communities along the Yellow River, and they were productive farmers. They used farming tools to harvest and prepare millet and rice, which supported the growing populations. Additionally, other cultural groups in other parts of China also contributed to the development of a common Chinese culture.