Guangzhou open four stop four restrictions: since July 1, 2018, zero hour, non-Guangzhou City, small and medium-sized buses (including temporary license plate vehicles) into the Guangzhou restricted area, the longest continuous driving time shall not exceed 4 days, and then again into the interval of 4 days or more.

Simply put, the maximum number of days a foreign license plate can drive 4 days in a row, open 1 day also need to stop enough 4 days to travel again.

"Open four stop four" management measures since July 1, 2018, effective for five years.