Hi , I want to see the Terra Cotta Warriors in Xi'an . Could you please remind me when we are arriving at that stop ?   Oh . You took the wrong bus . You need to take Bus 151 which goes the opposite direction .   Oh , no ! What should I do now ?   Don't worry . You can get off at the next stop and walk across the street and take the Bus 151 to the opposite direction .   Ok . How many stops do I have to go ?   About 15 stops .   That is a long way to go . It is so kind of you to help me . Thank you very much .   My pleasure . 