Which large country in the world has ONE time zone despite spanning multiple longitudes?

Q: Which large country in the world has ONE time zone despite spanning multiple longitudes?

China — uses Beijing time nationwide.. Politically imposed since 1949. In far western Xinjiang, sunrise can be at 10 AM. Practical inconvenience for national unity.

Question

Accepted Answer

China — uses Beijing time nationwide. — Politically imposed since 1949. In far western Xinjiang, sunrise can be at 10 AM. Practical inconvenience for national unity.