There is no time difference between Shenzhen and Guangzhou. Both cities use China Standard Time (CST, UTC+8). When it's 12:00 PM in Shenzhen, it's also 12:00 PM in Guangzhou.
Both cities are in Guangdong Province and share the same timezone as all of China. China does not observe daylight saving time.
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.
Shenzhen and Guangzhou are neighboring cities in China's Pearl River Delta, forming one of the world's largest urban areas. High-speed trains connect them in about 30 minutes. Shenzhen is the tech hub while Guangzhou is the traditional trading capital of South China.