One time zone is used in China, even though the country covers five geographic time zones. China's time zone is eight hours ahead of Coordinated Universal Time, also known as Greenwich Mean Time. The westernmost part of China, Xinjiang Province, uses an unofficial time zone with time set at UTC+6:00.
Before the end of Chinese Civil War in 1949, the area was divided into five time zones: Kunlun (UTC+05:30), Sinkiang-Tibet (UTC+06:00), Kansu-Szechwan (UTC+07:00), Chungyuan (UTC+08:00), and Changpai (UTC+08:30). The current official national standard time, called Chinese standard time, is valid since fall 1949. The special administration areas, Hong Kong and Macau, have their own standard times, but these times are also part of the UTC+8:00 time zone.