Single Fare
China UnionPayREST API
This type of transaction uses a contactless terminal at points of access to the
transit service. The single fare model functions on a "pay as you go" basis, where each
journey's fare is individually processed after every trip. Since the fare might not be
known at the time of tapping, both tap-in and tap-out data are collected and sent to the
transit system.
Figure:
Single Fare Transaction Flow