Buying tickets is a pain. You have to buy two tickets, and physically stack them together at the same time and feed into the machine at the gate.
Some trains and buses in remote areas only take cash. Some only take EXACT fare and the driver does not have change and will refuse you. I asked my hotel for exact fare by exchanging my foreign 10$ USD bill. The staff informed me it was illegal for them to exchange money. Lo and behold I looked it up and it is indeed illegal as you need a foreign exchange license.
Some trains and buses in remote areas only take cash. Some only take EXACT fare and the driver does not have change and will refuse you. I asked my hotel for exact fare by exchanging my foreign 10$ USD bill. The staff informed me it was illegal for them to exchange money. Lo and behold I looked it up and it is indeed illegal as you need a foreign exchange license.