How to invite my son to dinner on his 20th birthday?

It's really not necessary. If children can celebrate their birthdays between 1 ~ 3 years old, but they still invite them to dinner when they are 20 years old, it is far-fetched as a treat theme. The reasons are as follows: 1. If the child is 20 years old and admitted to any famous university, it is worth congratulating. Or congratulations on finding a good job. When you were a child, you could say that you must have invited a visitor. Do you want to treat your 20th birthday? Friends and relatives can't come empty-handed. Although you pay for a treat, it will add burden to others and bring trouble to yourself (please put yourself in others' shoes). Only 20 years old, please treat me this year and next year. It is uncomfortable to treat the same subject year after year. If the old man is over 80 years old, it is appropriate to celebrate his birthday. But he's not. 6.~~~