Try checking Halo's kitchen and look for a sentance that is in all caps! The rooms of one person mostly give clues about the other's next puzzle!
I think I've found all the things in Halo's kitchen. Entry 35 on the table, Entry 33 on the fridge, Entry 30 in the kitchen counter/cabinet, the card in the sink and the note from the hole in the wall.
If I remember correctly, the note in the wall is relevant. I'm gonna write the right password below, so beware of a spoiler.
SPOILER:
The code is RELEASE ME.
I did find that one, but that one's for the bedroom door in Halo's house. The code I'm trying to find is the 4 number one for the door in Li's house
aaahh, turn the word hell around and you've got the number
