Where was ancient China located in China

Ancient China was not one consistent regime (it had many emperors across many dynasties the constantly saw their empires grow and shrink. Relative to the Modern People’s Republic of China, the Empires of China were typically smaller (with exceptions for the Yuen and Qing Dynasties — which were not ethnically Chinese dynasties).

The overlap between the Imperial Chinas and the Modern China occur in nearly all provinces but overlaps minimally with the autonomous regions. Provinces in which there is little or no overlap include: Jilin and Heilongjiang in Manchura and Qinghai in the Center West. The Autonomous Territories include: Inner Mongolia, Xinjiang, and Xijang (also known as Tibet).
Ancient China was located in Eastern Asia and borders the Eastern China Sea, Korean Bay, Yellow Sea, and the Northern China Sea by Korea and Vietnam. Ancient China was located in Eastern Asia and borders the Eastern China Sea, Korean Bay, Yellow Sea, and the Northern China Sea by Korea and Vietnam.