Why is international tourism a local export of tourism services?

Tourism is a service industry that relies on special tourism resources and facilities in the region to provide services for tourists and obtain economic benefits. Tourism is a special field of labor cooperation. Labor exporters do not export labor services to other places, but provide labor services to foreigners in their own areas and get paid for them. At the same time, the labor importer needs to go to the labor export place to receive this service and pay the corresponding labor costs. As a "smokeless industry", tourism is one of the fastest growing industries since the 20th century, and it has created more wealth for the world than any traditional manufacturing industry, including oil industry and automobile industry.