1. What is the airport tax in China? Does the price include the airport tax?

Airport tax (which is called airport construction fee in China) is of 50 yuan (about US$6) per airport for flying within China, 90 yuan (about US$11) for international departure, (including flying to Hong Kong or Macau from mainland China). It is HK$50 (around US$6.5) if you depart from Hong Kong airport. This fee will be charged at the time when purchasing the flight tickets.