Maybe this is the door to the second season? Maybe this man is someone from Shen Yi's past? I wouldn't be complaining…
And also they didn't say who pushed him into the water after painting this picture, they didn't touch that story part so they could do it in season 2, and it's the person that pushed him into the water is coming back after him.
For everybody who's looking to watch this with english subs, you can find it over here. The subs and video are not perfect but at least we can get what's going on more or less :)
https://www.youtube.com/watch?v=77ZfuTacO1E
You can watch with eng sub here, they subed to ep 5 so far ;)