Is it true most of ancient Chinese history took place in outer china?

No, it is not true that most of ancient Chinese history took place in outer China. The majority of significant historical developments, including the rise of dynasties, cultural advancements, and urbanization, occurred in the central plains of China, particularly in areas like the Yellow River basin. Outer China, which includes regions like Tibet, Xinjiang, and Mongolia, played important roles in trade and cultural exchange but was not the primary center of ancient Chinese civilization.