Security at the domestic terminal was very strict. We were swabbed for explosives 3 times at 3 different checkpoints. Make sure you aren't carrying water or cigarette lighters, as these will be confiscated. Terminal is so big we had to make use of the Enquiry desk (the girls speak English) to get directions to our gate. Plane was exceptionally clean and left on time, even arriving into Tianjin early. Would recommend China Southern Airlines.