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What factors can influence traveller individual travelling entertainment activities arrangement choice? What are the unreasonable or unpredicting factors influence global future tourism development? What may help space tourism leisure need raises to replace global earth tourism leisure need in possible? Can COVID 19 influence global tourism encounter recession ? How economists view fators may influence traveler leisure destination choice ? How future earth warm and air pollution brings negative emotion to traveler? I shall indicate some methods to attempt to explain whether what factors can influence airlines service performance or service level to be raised either better or worse. I hope that my readers can learn any new airline service performance improvement knowledge after you read this book.