Explanation:
Grave refers to the mound built on the ground after burying the dead, and it is also made of bricks and stones. North means to sweep the graves of the dead. When sweeping graves, you can't be empty-handed. You should bring some paper money and food to show your heart, hoping that the other person can have money to spend and something to eat in the other world.
Paper money is usually yellow paper or printed matter, and now there are some folded gold ingots, Jinshan Yinshan and other things, the symbolic meaning is "money", so that the deceased can also have money to buy things in another world. Newspapers don't have this function. Burning them is cheating. I'm fooling ghosts.
Extended information Other two-part allegorical sayings:
1, making trouble in the palace of hell in the middle of the night-secretly playing tricks.
Explanation: The temple of Hades is full of kids. Going in the middle of the night is also a ghost, that is, using tricks or tricks in secret.
2, the devil who tore off the painted skin-the fierce face was exposed.
Explanation: A ghost without packaging is an evil face, and its ferocious face is completely exposed.
3, the city god came up with an idea-there are many tricks.
Explanation: the city god is also a ghost, and the idea is a trick (ghost). Here, homophony is used to describe many bad ideas.