I will be going to China on the last stop of a 4 country trip (Vietnam, Laos, Thailand and China). I will have 5 free pages in my passport when I leave for this trip and I know that Vietnam and Laos will take up a full page of my passport each. So I should have 3 free pages or 2 and a half (if Thailand decides to stamp on a blank page). Will this be enough to enter the country? I am inquiring now because I am in Korea for the next two months and so if needed I can get a new passport here (although it is very expensive and not very accomodating to my work schedule).