There is no time difference between Hong Kong and Shanghai. Both cities use the same UTC offset (UTC+8). When it's 12:00 PM in Hong Kong, it's also 12:00 PM in Shanghai.
Neither city observes daylight saving time, so they remain synchronized year-round.
Any time works! Since both cities share the same timezone, you can schedule calls during standard business hours (9:00 AM - 6:00 PM) without any time conversion needed.
Hong Kong and Shanghai are China's two major financial centers with extensive business connections. Hong Kong serves as a gateway to international markets, while Shanghai is the largest city in mainland China. The flight takes about 2.5 hours.