There is a zombie movie in Ching-Ying Lam, which tells that I met a female ghost, and someone put a spell on them to turn them into dogs, and finally they made love to each other.

No, you said it turned into a dog when you put a spell on it, but it finally turned into a dog with a dog hair on its forehead. I guess you're mistaken. That's not Ching-Ying Lam's. Dogs that become dogs are called stone swords, and they take silver swords against demons. The devil wants to kill someone at a certain time to be reborn. Shi Jian found the dog Wang Lun and asked for a pinch of dog hair to stick on his forehead, so as to follow the devil. That should be what you said! Then there's the ghost you said. Did you put an egg on the ground for Shi Jian to step on? As a result, Shi Jian's hair turned white. He is cultivating immortality! If it's true, it's that the magic has not run away.