Seoul is 1 hour ahead of Shanghai. Shanghai uses China Standard Time (CST, UTC+8) while Seoul uses Korea Standard Time (KST, UTC+9). When it's 12:00 PM in Shanghai, it's 1:00 PM in Seoul.
Neither China nor South Korea observes daylight saving time, so the 1-hour difference remains constant year-round.
Best calling time: 8:00 AM - 5:00 PM Shanghai time. This corresponds to 9:00 AM - 6:00 PM in Seoul, covering standard business hours.
Shanghai and Seoul are major East Asian economic centers with extensive trade and investment ties. Direct flights connect them in about 2 hours.