On a blind date in Hunan, the woman's parents asked the man if it was appropriate to put it on the altar. Is that so?

This is not always the case in plenary meetings. Some people may believe that birthdays are superstitious in this respect, but some people with higher education or higher cultural level don't believe these things. So, if you think this situation is not suitable for you, or makes you feel disgusted, you can not accept it. This is not a custom, but a feudal superstition.