In 1912, the Republic of China established five standard time zones, namely Kunlun (UTC+05:30), Sinkiang-Tibet (UTC+06:00), Kansu-Szechwan (UTC+07:00), Chungyuan (UTC+08:00), and Changpai (UTC+08:30) [REF].
Daylight saving time was observed from 1986 to 1991 [REF].