Don’t worry about hotels as the hotel porters are willing to help you with your luggage when you check in or check out the hotels. But as you said you need to tip them a little. However, this kind of service is not always available at the airports. At some airports like Beijing, Guilin or Shanghai, the porters or red caps may help you with certain service charge, while I don’t see any them at the airports in Xian, Chongqing and Yichang. But the staffs there are also very kind if you ask help from them.