So from what I see(or predict) from the trailer after watching 4 episodes:
- YWS seems to be completing some kinda mission together with GZY which I am guessing is probably helping him in his journey to become a capable Sword wielder.
- In one of the scene we see jin fan carrying YWS in his back and escaping from the gong clan supporters, which means, either, the gong family is already suspicious but gong zi yu isn't, so he wishes to protect her, or he probably is in love with her and also knows her hardship, so wishes to protect her.
- YWS seems to be crying in a scene and blaming HYS for something, so there's two possibilities, either she realises that she wouldnt be getting freedom because wufeng had decided to sacrifice her from the very start, or probably someone innocent she cares about dies
- The girl whom we see with YWS in mud scene seems to be crossing miasma forest and suffering from suffocation, so it seems she does have a major role.
- Someone seems to have died in hanging rope, whom according to his figure, I am guessing to be Housekeeper Jia ( the medicine shop guy who exchanged eternal flower with herbal spirit if you have watched ep 4.
- At the end when we see United version of gong family against wufeng, only one of the elder is present, which means other two elders have died.
Do put up your own analysis too!