Shanghai, Beijing, Shenzhen
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Asia/Shanghai
The local time in China, live to the second. The whole country, including Shanghai, Beijing, Shenzhen is on UTC+8 all year, with no daylight saving time.
The live clock at the top of this page shows the current time in China. Shanghai is on UTC+8 right now.
China uses GMT+8, which is UTC+8 today (IANA time zone Asia/Shanghai).
No. China stays on UTC+8 all year, so its clocks never change.