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Zhengzhou is the capital of Henan province in central China, with a population of roughly 4.3 million. It observes the country's uniform Asia/Shanghai standard at UTC+8, maintained with no daylight saving, so local clocks run eight hours ahead of Coordinated Universal Time throughout the year. The city lies on the plains south of the Yellow river, at a historic crossroads of the Chinese interior. A major rail junction and provincial capital, Zhengzhou ranks among the largest cities of central China.