How to handle the family number of Tianjin China Mobile?

You can dial 10086 and set it manually or according to the prompt. After that, the other party who wants to set the family number will receive a short message, which roughly means whether you agree to set the family number for a certain number. After the reply, it was set successfully. If you go to the business hall, it is very troublesome to ask the other party to go with their ID cards.