Is China at the Center of the Earth?

No. The Earth's geometric center lies ~6,371 km beneath the surface—deep in the inner core—and is not within any country's territory.

However, the geographic center of China (the centroid of its landmass) can be calculated. It falls in Shaanxi Province, near the city of Xi'an (approx. 35.5°N, 107.5°E). This point has no geophysical significance; it's simply a mathematical centroid.

The concept of a "center of the Earth" is often confused with the "center of a country's land area" or cultural/historical claims (e.g., "Middle Kingdom" = 中国).