This questionnaire data is used to collect information on airport selection and satisfaction evaluation of air passengers in dual airport cities. We invited passengers who have flown in Beijing, Shanghai, and Chengdu to fill out the questionnaire. The survey results are only for academic research purposes. Please fill out this questionnaire based on the passenger's usual travel situation and personal preferences. Multiple choice questions with 0 indicating no selection and 1 indicating selection, a total of 755 valid questionnaires were collected