Booking early almost always ensures you have more options of car models to choose from, as well as prices reduced by up to 19% to make it a great deal. Try to book at least 60 days prior to when you need the car rental to close on a rate below the average.
Typically, how long you can rent a car for depends on the inventory of the supplier. For Shanghai however, it is certainly possible to rent a car for an entire month.
Value for money