Why is the mobile phone number on TV represented by XX?

1: Protect personal privacy and prevent the winners from being harassed or blackmailed.

2. The four hidden numbers in the middle are the area code of the mobile phone number. Although this kind of program hides the specific area code of the mobile phone number, the host usually says which province and which city it is, so the person who is drawn can know that he won the prize through the area he said and the four digits that are not hidden behind, and this does not completely disclose his mobile phone number (because others don't know the specific area code of each place).

The last four digits of the mobile phone number are the same, so the probability of people in a city participating in the lucky draw at the same time is extremely low and can be ignored.