I'll start by saying that if you aren't used to the explicity and the bizarre endings that characterise chinese gay movies, maybe this is not made for you.
Plot/Characters:
I don't know if it is just my personal taste, but I found this short pretty intriguing. The story is one of a kind I would say, or at least not one you could find everywhere. It is a short film so it doesn't show that much or doesn't explain in details what portrayed; but still it was able to express something.
The first thing I noticed is that most of the events take place at night, maybe because it is one of the quietest parts of the day so the perfect one to do things undisturbed; so suitable for Ting's purposes.
I have to admit that my first impression of him was of a young, certainly sensual, and cold boy. Cold because as we could see he didn't seem to care that much about his boyfriend, but to find more interesting everything related to his teeth. But towards the end of the short my perception of him changed. He may seem to be indifferent as before, but his eyes tell that there's something troubling him. When he watched the photos of him and Mark, his boyfriend, I realized that maybe it is not like he doesn't care about him, but he finds it hard to do so due to his "fetish". I believe that in some kind of way he feels guilty because he knows that he will never be able to love him, since he can't find pleasure in anything else with the exception of teeth-related stuff.

Cast: the acting wasn't one of the best I've ever seen, but it wasn't bad either. I liked the way the main actor interpreted Ting because in my opinion he was able to portray well his obsession.

Cinematography: the scenes were on point and conveyed perfectly the sense of obsession.

So in conclusion I didn't dislike watching this short film, but as said before I would recommend it only to those who appreciate ore are familiar with similar movies .