Start off, this movie was slightly better than MNSS: Flowers Bloom in February. Only slightly though.
Again I question why these movies were made if the production and quality were so terrible. Garbage.

This story is set Pre-Mystic Nine Drama setting, where Huo Sanniang had not yet been the head of the Huo family. The ending is open ended, but leads to show that there is a common enemy at this period. He appeared in Tiger Bones Plum Blossom too. I suspect all 4 movies are actually Pre-Mystic Nine setting.

The acting was mediocre... However, they didn't CGI the background, so I appreciated that aspect. The plot was unsatisfactory because half was answered and half was left in the open. I hated all the characters in the movie. Huo Sanniang was ok, but not any better.
I think it would be a cool to make a Pre-Mystic Nine Drama to see how the group worked together before and fight against the "Mystery Man". I'll leave it at that.

WARNING SCENE - there's a topic of abuse in the movie (you can see in the tag) so be careful.

My advice, watch in this order:
1. Four Belongs to Abelmoschus (Warning! some scenes are hard to swallow, well for me at least)
2. Tiger Bones Plum Blossom
3. Ganges Kiling the Trees
4. Flowers Bloom in February (Don't even waste your time watching)