Why do travel agencies send so many faxes?

It mainly involves the reservation of hotels/guesthouses, the reservation of scenic spots tickets, the wholesale of routes between travel agencies and the issuance of route lists.

Usually, when booking a hotel, you need to send information such as the number of people, the number of rooms you need, what kind of standards, how much money to pay in advance, and the seal of the travel agency by fax, which is regarded as a contract/agreement booking method.

I won't introduce the others one by one. In short, travel agencies must have fax machines, and they often use them.