What is the definition of travel?

Non-10 cal travel: Many countries, regions and institutions regard the round-trip distance between residence and destination as an important statistical indicator. Travel distance: the determined standards vary greatly, ranging from 0 to 160 km). Travel less than the prescribed minimum itinerary is not included in the official travel estimate, and the standard is artificial and arbitrary. (4) Definition of overnight visitors: In order to reach the standard of defining "tourists", most definitions of tourists and tourists include the requirement of staying at the destination for at least one night. The "overnight" rule excludes many recreational "day trips", but in fact, "day trips" are often an important source of income for tourist attractions, restaurants and other tourist facilities. (5) Other aspects of the tourist's place of residence: It is more important to know the tourist's place of residence than to determine other demographic factors, such as nationality and nationality, when making market positioning and formulating relevant market strategies.