Ok.... the movie is highly "inspired" by the Spanish movie The Invisible Guest(2016) which was very popular in China, the plot twist is almost identical. I'm very disappointed as I was expecting something different from this Chinese movie. Acting wise...IMO except for the main male actor the rest felt awkward and unnatural, this is the feeling I usually get from many Chinese actors, maybe their acting is different. Please make sure to watch the Spanish movie before watching this one, even better don't watch it at all. Is this a remake? Hope so, because I personally hate copycat movies.