For Bailu theres 8 known quests so far that can be done at this times (some unlock earlier, but this are good times when you can do em):
When you need to gather 2000 yuan for booze:
- Capsule Toy quest
- Gambling Man: Date quest
- Fishing Hut: Stamp quest
- Elder Yeh: Herb quest
- Story Teller: Listen quest
After beating the Thugs and the Boss
- Panda Store: Mushroom quest
- Panda Market Kid: Pail Toss
- Sunflower Meadow: Ghost hunt quest
These 8 quests will not give the trophy, so something might be missing.
I'm still in Bailu, 20 hours in, trying to talk to everyone at every time, but thats all i found.
The fact that nobody got the trophy so far lets me belive that it's either bugged or there is stuff missing.
Also whats with the shoes toy-capsule set? Don't think anyone found that yet. Or whats with the "all highscores at minigames"? I got highscores on everything and still no trophy, as nobody else has. I also went to all herb locations with the herb map and didn't got that trophy either.
It's almost as if an entire area is missing and thuse the trophies not possible.
[EDIT]
added pail toss