What are the general characteristics of in-depth tourism?

Free travel generally belongs to in-depth tourism. Anyway, regardless of whether you join a group or not, the so-called in-depth tour means that you have more time, play and understand more deeply. For example, if you come to Beijing to visit, some arrangements will be for you to see the Bird's Nest and Tiananmen Square. If you go in-depth, you can experience Beijing culture more, and they will arrange for you to visit the Summer Palace, Houhai, Old Beijing Hutongs, etc. Moreover, most of the in-depth games are inaccessible and can only be played by free travel.