Tourism is defined as travel for recreational or leisure purposes. There are two main types of tourism: domestic tourism, which involves travel within one's own country; and international tourism, which involves crossing national borders. The document outlines trends in both domestic and international tourism globally and in countries like China. International tourist arrivals have increased dramatically from 25.3 million in 1950 to over 940 million in 2010. Similarly, China has seen a large growth in domestic tourists, from approximately 1212 million in 2005 to over 2641 million in 2011.