After Xiaomi 12 cancels the transportation card, the remaining money in it can be returned to Xiaomi wallet or WeChat change, which usually arrives within 7 days. The specific operation steps are as follows:

1. Open the Xiaomi mobile app on your mobile phone.

2. Click on the service center in the lower right corner.

3. Click on the business.

4. Click on how to handle the sales number business.

5. Click here.

Please note that this is the operation steps for Xiaomi Mobile app, and the specific situation may be different. If in doubt, it is recommended to check the help documents of related apps or contact customer service.