巴黎RER zone 4-5票價

Because if you buy the ticket from zone 1 to zone 5 the meaning is if you want go to zone 4 is including already, they didn't care is you from zone 5 go to zone 4 because you paid already and if you still didn't understand, you may send me e-mail [email protected] because I live in Paris. I hope I can help you because we are hongkong people.