China adopted a single time zone for the entire country in 1949. The government designated UTC+08:00 as Beijing Time after the establishment of the People’s Republic of China.
Before 1949, China used several time zones. A five-zone system was proposed in 1918 and later formalized, with offsets ranging from UTC+05:30 in the far west to UTC+08:30 in the northeast. These zones reflected China’s immense east–west breadth.
The change made national administration, transportation, communications, and broadcasting simpler. It also means that western China experiences very late sunrises and sunsets by the clock. In parts of Xinjiang, residents often use an unofficial local time two hours behind Beijing Time alongside the official national standard.
Taiwan and some other Chinese-administered or historically connected regions have their own political and timekeeping histories, but mainland China continues to use one official time zone. The 1949 change therefore marks the national adoption of Beijing Time, not the first appearance of UTC+08:00 in Chinese history.