Girls can't go to the grave without getting married.

Customs vary from place to place, but they are quite complicated. As far as our hometown is concerned, if a girl dies less than 10 years before marriage, she can never go to the grave after marriage!

In fact, these are just people's feudal superstitions. The reason why people pay homage to their dead relatives is a kind of nostalgia for the deceased! There's no need to share so much!