What is the connection and difference between tourism and leisure?

Tourism is a kind of physical and mental free experience in which people spend their spare time outside their daily life and work environment for recreation, aesthetics and knowledge [1]. It is a short-term leisure lifestyle, cross-cultural communication and high-level consumption activity (generally speaking, the time should be more than one day but less than one year). Simply put, tourism is a variety of physical and mental freedom experiences that people use in their spare time to go to places outside their daily life and work environment. If expressed in the simplest and most popular but inevitably less rigorous language, tourism is "leisure tourism" or "leisure activities in different places". Leisure refers to people relaxing their bodies and minds in various ways of "recreation" or "entertainment" in their leisure time, cultivating interests unrelated to making a living and spontaneously participating in social activities. Marx called leisure "free time". In the draft of surplus value theory, he pointed out: for human development, "leisure" is a time that can be freely controlled and is not absorbed by direct productive labor. One is time for entertainment and rest, and the other is time for developing intelligence and mastering spiritual freedom. Leisure has existed since ancient times, and leisure in the modern general sense refers to two aspects: one is to relieve physical and mental fatigue and restore physiological balance; The second is to get spiritual comfort and become a post station for the soul. It is a free activity after the completion of socially necessary labor and a form of human life.