The difference between account number and user name is: different combinations, different changes and different visibility.

First of all, the combination is different

1. Account number: Account number consists of numbers, letters and symbols, and generally does not support Chinese.

2. User name: User name can be a combination of characters, numbers, letters and symbols, and supports Chinese.

Second, the changes are different.

1. Account number: Once the account number is generated, it cannot be changed at will.

2. User name: After the user name is generated, it can be changed at will.

Third, the difference can be seen.

1. account number: the account number is for the user's personal use only and is not visible to others.

2. User name: User name is for personal use and can be seen by others.