Using an electric mixer, beat 2 pounds cream cheese until smooth.
Add sugar; beat until smooth and fluffy.
Beat in eggs one at a time, just until blended; do not over beat.
Add pumpkin, whipping cream and vanilla; beat just until blended.
Combine flour and the five spices in a small bowl; beat into pumpkin cheesecake mixture just until blended.
Pour filling into springform pan on top of the prepared crust.
Place the springform pan into the prepared water bath pan inside the oven and add another kettle full of boiling water to come halfway up sides of the springform pan.
Bake cheesecake until slightly puffed, softly set and the top is golden; about 1½ hours. Turn oven off. Do not open door; leave cheesecake in oven for additional ½ hour.
Carefully remove springform pan from the water bath, taking care not to get any water on your hands. Please note the water is extremely hot and whatever you use to remove the pan might get wet. Transfer springform pan to wire rack covered with a dish towel and cool to room temperature; remove foil. Refrigerate cheesecake uncovered overnight. Leave in pan until ready to add topping and serve.