![]() Īfter the defeat of Beiyang government in 1928, the mission of the Central Observatory was moved to Nanjing, and the reference time standard used for the construction of traditional Chinese Calendar was shifted from Beijing Mean Solar Time to UTC+08:00. By 1918, five standard time zones had been proposed by the Central Observatory of Beiyang government of Republic of China, including the Kunlun ( UTC+05:30), Sinkiang-Tibet ( UTC+06:00), Kansu-Szechwan ( UTC+07:00), Chungyuan ( UTC+08:00), and Changpai ( UTC+08:30). Starting in 1914, the Republic of China government began adopting the Beijing Local Mean Solar Time as the official time standard. Until 1913, the official time standard for the whole of China was still the apparent solar time of Beijing, the capital of the country at the time. However, the time zone for the rest of China remained undetermined. ![]() The practice has spread to other coastal ports, and in 1902 the "Coastal Time" was proposed to be the universal time zone for all the coastal ports in China. By the end of 19th century, the time standard provided by the observatory had been switched to GMT+08:00. ![]() In 1880s officials in Shanghai French Concession started to provide a time announcement service using the Shanghai Mean Solar Time provided by the aforementioned observatory for ships into and out of Shanghai. In the 1870s, the Shanghai Xujiahui Observatory was constructed by a French Catholic missionary. Main article: Historical time zones of China
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