Transiting Shanghai on US Passport that expires in less than three months

Greetings! I am a US citizen traveling to the USA from Maldives. I will be transiting Shanghai for less than 72 hours, then flying to Hong Kong for a few days, before continuing to USA. My US Passport expires in February (less than the normal six month validity requirement for entry to China). My question is - Can I enter Shanghai and get the 72 hour transit if my US Passport expires in three months? I also have a valid Chinese 'Crew Visa' which would have no bearing on this trip, since I am traveling as a passenger. Thank you!