Instructions for adding and replacing commuter passes

Due to the reform of the monthly pass, the total base of tickets has become larger, and I have been trying to find a balance, but in the end I didn't get a result, so let's try again.

There will be no change of monthly pass at the end of this month, 2 days at the beginning of next month, and another 2 days in the middle of next month, for a total of four days. (To be continued......)