If you just walk, the time it takes to visit both South Park and North Park depends on factors such as the distance between the two parks and your personal walking speed. Generally speaking, if the distance between the two parks is long, the walk may take anywhere from a few hours to a day. The specific time needs to be estimated based on actual conditions.
If you take a battery car in the park, the time required to tour the South Park and North Park is usually shorter, maybe only a few hours. This also depends on the driving route of the battery car and the stopping time of each segment. The specific time also needs to be determined based on actual conditions.