Which parking lot is cheaper near Nanjing Underwater World?

North end of post office road parking lot. 200 meters north of Nanjing Underwater World is the parking lot at the northern end of Post Office Road. There are many parking spaces in this parking lot. Because it is an open-air parking lot, and the parking location is a bit neglected, the geographical location is a bit remote, so the parking lot is also cheaper. Two dollars is about an hour, which is very cheap.