Interesting thou not particularly original, I've read 2 (edit: more like 20) other manhua/manhwa that could be said to be pretty much the same thing, very similar story, still this one is among the best so far. Main char is very interesting and quite ruthless, a bit too much at times, like ruining a whole family because she's pissed off by one of their daughters. Story is the typical "transported to another world or age at death", our MC is something like an army doctor or something like that and has access to an endless supply of modern medicine... (that part I actually hate and find completely unneeded) so you can imagine the impact she might have in an ancient chinese type of setting.
My main gripe with this one is the pace, its just too fast and is skipping things all the time, there is little transition from one scene to another and that ruins the char development and story progression to some extent. I would like to read the novel, pity it hasn't been translated.
Also, after quite a few chapters the story is still going on about the same things and same characters, the lack of a semi-competent opponent and general development is pulling this down, considering the fast pace you can see the recycling of the same ideas.
So far, definitely a good series but I prefer Peerless Alchemist which is very very similar.
Edit: unfortunately and as it all too common with this kind of story, it starts to rail off after 100-150 or so chapters, as others say above, she gets too ruthless at times and, what I find worse, she just manages to win almost every argument or change any person's mind with just a few words, yeah, she's smart at times but most of the times everyone is just too stupid. As for the rape and female standing in society, I certainly don't like it but the story is not set in modern times, it should not be judged by modern morals nor standards.
also
maybe I'm wrong since I read those parts long ago but usually the rapes caused by Aheng are paying back with the same coin, she never (as far as I remember) plotted for someone to get raped from her own initiative. Example, wasn't the gang-rape orchestrated by the other side, Aheng manages to escape the plot and leaves the perpetrator to be on the receiving end of her own plot?
Might not like that either but being ruthless is a big difference from being depraved.
It's still fun at times but at this juncture (300 ch) it's a mediocre story, the MC's moral compass keeps getting worse and the story still advances slowly. changed rating 7 > 6.
Edit 2: Continuing the downhill, after 400-500 chapters the author just starts to add crap to the story, the space from where she could only pull things out from becomes a room, then a building, and it has all sorts of things that make no sense, and the author starts using this power to teleport the MC, bring guns to the story and crap like that and the story went to the dumpster to be honest. When authors take those shortcuts I have yet to find a story that doesn't derail and becomes boring, bad, or whatever you want to call it. It might have been different if the power was explained and consistent all the time but it's just a magician's hat at this point. 6 > 5