As a reader of the actual novel, I wasn't aware of this adaptation since not that long ago, so I gave it a try and... It truly feels like it was very fast, too fast. Note that I will judge because of what I read, make some little comparisons and will also tell what I felt about it.

So, I don't know why they decided to adapt it that way, but the way their relationship was rushed is clearly something that doesn't seems right to me, it doesn't seems as natural and simple as I was expecting it to be. For a short movie like this, it was expected, but they could only adapt a short part of the story with their cute interactions at the beginning for example such as the way Lin Zhixiao met the Doctor with an apple and offered the apple to him but then she realised that the apple was only half peeled. They made the apple a thing though, it was a cute reference, but only as a reference, it truly meant nothing as a watcher only.

The way they tell us some details about the story is really abrupt. These informations are mostly coming from nowhere and that's mostly caused to the rushing of the actual story.

It also seems like their characters changed a bit, I don't remember Dr Gu being this flirty, not that I mind it actually but it's so strange. Same for Lin Zhixiao, she's just being a cute young lady here. Their chemistry is quite nonexistant, that's quite sad but also understanding since they really rushed the process of it. The actors themselves also seems like they're kind of lacking, espacially Dr Gu's, Xu Fangzhou (I'm adding this as an other reason for their chemistry to be only meh).

What I found interesting though was how San San was portrayed here, she really is different to Lin Zhixiao and they showed it well. I really loved her and was happy when she came as gorgeous as she was supposed to be. They have a really good chemistry together, almost better than the actual couple themselves and that's funny when you see a particular moment between these two in the movie that was a nice touch to their relationship.

I won't talk about the ending scene in details but I thought that it was an interesting way to end it even if it wasn't something their actual characters would do.

So in the end, is it watcheable? Yes, it is.
Is it worth it? Well, if you're waiting like me for the drama adaptation of it, it's maybe worth giving it a try.