1. Functions and services: Beijing One Card White Card not only serves as a traffic card, but also extends other functions and services, such as public bicycles, parking lots, library borrowing and access control. These extra functions and services need cost support, which may lead to higher card prices.
2. Technology and payment cost: One-card system involves technical equipment, operation and maintenance, payment management and other costs. These costs will also be reflected in the price of white cards to some extent.