Jining drinks happy noodles and red eggs. Why do boys return orders and girls return them right?

Back to the red egg, the boy's receipt means only child, but also to reflect the meaning of important position. I have a boy and I don't want to have any more children. The girl's double double is to tell everyone that she is going to have another child. This is an ancient custom, but it has disappeared a lot now. The main purpose of sending eggs is to tell people their happy faces. It is a "tool" for access. No one really checks the quantity.