You find all Chinese quests here
Scroll a bit. If I saw it correctly, you find the monk of the Earth in the city Digjong.
That’s if you did everything before that point. Scroll up a bit to check what you missed to do.
The last quest before that should have been in here
You can also try if a restart of the game helps to make the monk of the earth appear.
Oh, and did you check all columns in the temple of the dragons? Maybe you are ready to talk to the dragon itself?
What is the name of your last location?