In all password management, resetting the password means that the user forgets the password/the original password is invalid and resets a password after passing various verifications.

Changing the password means that the user changes the password when he knows that the original password is valid.

The difference between them is that the verification of password modification is relatively simpler than password reset. Take a savings card as an example: password modification can be operated on the ATM of the corresponding bank, but password reset requires me to go to the bank counter with valid identity documents.