In what region of China do Chinese people only account for 40% of the population?

East Asia

China is a country located in East Asia with an area of 9,596,960 km2 (3,705,410 sq mi).

Explanation:

Shanghai (上海), is China's most populous city situated on the eastern coast of the country, a port on the estuary of the Yangtze River.

Shanghai is the correct answer

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