In railway stations, airports and other places where foreign guests are concentrated, some taxi drivers are wicked enough. They don't pull short distances, but like to stretch them. What's more, many people use ghost watches (that is, 1 km jumps 0.8 km). As for the deliberate detour as you said, it is easy to deal with this kind of driver. First, you must ask him for a taxi receipt. Second, it is best to write it down separately. If you feel in doubt, his company phone number and complaint phone number are on the ticket. (Actually, it's not just to complain. In case something is lost, it is still possible to find it by ticket. If you complain about him by ticket, the staff of the passenger management office can quote the actual mileage and price directly according to the boarding and alighting places without asking them. Such drivers will be severely punished.

So I suggest you take your ticket to complain to him and let him know that the bully will be punished.