Picking up a car from Budget at San Francisco Airport is very convenient. Follow the signs to take the Blue Line shuttle train to the rental car center, where you can see all the rental companies. When handling the rental paperwork, submit the driver's licenses and translation documents for all drivers, as well as a credit card for each driver. The rental cost was almost the same as what I booked on QEEQ. You just need to print out the order, sign it, and you’re good to go. The staff at the counter will give you a slip with the car’s parking location. Check the car for any issues and drive off. It’s much more convenient than renting a car in China.