According to the Shenzhen Special Zone News, those who have not changed their mobile phone numbers for more than 5 years are quite trustworthy friends.
According to sample surveys in China, the United States, the United Kingdom, South Korea, Russia and other countries, it is concluded that if a person's mobile phone number can remain unchanged for more than 8 years, it can be determined that this person is a very trustworthy person.
How many years has it been since you changed your mobile phone number?
