This is a solid remake. I know it's originally based off of a Spanish movie, but I've only seen the Korean one. So, first things first, in terms of the two, I definitely recommend the Chinese version.

This film felt purposeful. There is a motive to wanting to tell this story. If you wait until the end, there are some comments made about how women constantly feel unsafe living alone because of the possibility of bad things happening. And this film chose to help audiences understand this.

In terms of the plot, there was a lot. The Korean version felt a bit too obvious, But this version had quite a few red herrings, and there were so many people the main character (not the audience) could trust. The stakes were higher because of this.

Additionally, it was actually quite terrifying at times. Just thinking about the possibility of being in her position is enough to make anyone scared. And this film really captured that. At times, you see her do small things to make it seem like there's a man home because she already felt unsafe. And despite that, she is still targeted.

All in all, it achieved its goal and in my opinion, was a successful adaptation that didn't follow its Korean counterpart