What does Tour K mean?

"K group" usually refers to the * * reservation of the tourism industry. In tour groups, there is a limit on the number of people in each tour group, so travel agencies need to reserve seats in advance. If tourists sign up for a tour group, they may even pay money, but if they don't reserve seats, they may not be able to join the tour group. However, the general travel society requires guests to pay for reservations in advance.