What is a tourism node?

The tourism node is a watershed between the low tourism season and the peak tourism season. Just like the highest point and the lowest point of the stock market, the highest point and the lowest point are nodes.

Historical nodes of modern tourism:

There is no such thing as tourism in modern China, either from the feudal ethics of "parents not traveling far away" or from the actual situation. Long distance travel for entertainment purposes. China’s tourism really started in 1980.

In the United States, the western development and gold rush in the 19th century brought tens of thousands of Americans to the West Coast. After the opening of the Pacific Railway, wealthy people from the eastern United States began to go west for the purpose of hunting for adventure. This was almost the beginning of tourism on the American continent.

In Europe, traveling between principalities and city-states is not a big deal in peaceful times, so it is difficult to find a start for European travel.