I love that movie so much. I only know the english title of the chinese movie. It's called "Happy Ghost 3." There's actually 5 sequel parts together but the one you're talking about is the 3rd one. Here's the link to it in chinese: http://www.youtube.com/watch?v=0LCQxSwiHUs
i dont think that's the one they're talking about. the one they're talking about is:
a girl was kill because her younger sister was with the bad guy and she want out. to get out the girl who got kill had to paid them or have sex with the leader guy. he did a force kiss on her, i think she bite him and he push her off the roof. so and who, there's david who is married, but on a verse of breaking apart and his job is to sell houses. his boss give him this one place to check it out, went, got lost meet the dead girl ghost whose wear purple. she give him the direction. he went to the wrong one and got yell and fire then the boss want him back. he got three friend guy, they went to party with some girl and decided to go to the haunted house, they got scare by the ghost lady. thing happen, he started to lived in that place and his buddies keep on telling him that the place was haunted, but he wouldn't believe. so they told to break the Buddha beads in front of her, she flew away. then the nice song comes on. she haunts him. he left one of his file at the place he was standing at with the ghost, he went there and found his wife there. took her and got out of there. he later found out his "wife" was actually the ghost, because he found his actual wife cheating on him with a young guy. he confronted her at dinner and that his wife doesnt eat meat and she was cooking streak. she told him what happen to her and she want him to help sister to get out of the place. he was able to and david and the ghost spent their last moment together before she get reborn. at dinner, it was quiet, he force her to go. she went and as she reach to the door of the labor room she sense something wrong. true, david wife came back, wanting him back and she was acting crazy. she hit him in the pan, the ghost came back the wife did something and boom! the wife die there while david drive the ghost to the hospital. the got to the labor floor, it was too late the lady already gave birth, cried... the the doctor say oh there's another lady giving birth. she went....years later. he was quiet old. he was drinking tea?? or coffee. a tennis ball came rolling or a birdie, the main girl/ ghost was reborn and ask for it back and say thank you and she walk away.. the end.
yeah, this is the movie they where talking about.