Oh, how delightful! It seems like you've had quite the adventure at Chengdu Tianfu Airport. Getting hassled by the police for being a foreigner who successfully made it through the e-channel gate must have been an interesting experience. I suppose they just couldn't believe their eyes or were simply not accustomed to witnessing such remarkable international travel skills. Well, at least you've made your mark and left them with a memorable story to tell around their police station coffee breaks! Just remember, sometimes it's nice to be the center of attention, even if it comes with a touch of inconvenience. Safe travels and keep spreading those unique experiences wherever you go!