Some update, P'Anne gave an interview at the event and she mentions Qi Pao.
She said it's 50% done. She had to play 3 characters: the girl before she died, the ghost and the main girl who investigate the truth. To film this, She is sleeping over at ch3 ( because the filming day is very long). Sometime, she has to play multiple character on the same day. So she has to put on and remove make-up. (According to P'Yee, P'Anne schedule is jam-pack. She appears in every scene.). (So the crew gave her a spa to relax sometime, as you see on her IG a few times).
The most difficult part about this role is that the girl is in her early 20 and has lots of energy. She, herself, already past that age and her own character is more still. In order to put in the character, she has to put in more energy and lots of movement. But she has to be careful not to go over the top.