1, telephone area code and telephone number, for example, 010-* * * * * *, where the short bar indicates Beijing area, followed by the telephone number of the user.

2. ID number, such as your own ID number, which also includes information such as region, date of birth and gender.

3. Personal account number, such as bank card number.

4, #000000 stands for black.

There are also license plate number, house number, zip code and student number. ......