It is said that Old Man Yuexia has a copy of the Mandarin Duck Book in his hand, which records everyone's love secrets. In fact, everyone does not know that Old Man Yuexia is lazy and confused, so he will not take the trouble.
But "Yuanyang Pu" does exist. Its author is Yue Lao's young apprentice, called Hong Niang, but that is just her current name. She used to be called Arnold.