I arrive at midnight at the Pudong Int'l airport.What is the cheapest way to get to HongQiao airport

The last airport shuttle bus for Hongqiao airport stops at around 23:00. If you can catch that bus, this is the cheapest method. If you cannot catch that bus, it is suggested to stay one night near the Pudong airport and catch the earliest shuttle bus at 07:00 the next morning to reach Hongqiao.