How can I get the tomb opened?

Hint 1 of 9:

Wolf has key to open the door of the tomb, but he won't open it for a whim.

Hint 2 of 9:

He would open it if he believed the old Baron, not you, was using the alarm.

Hint 3 of 9:

You must distract him before pulling your trick, so he doesn't see you do it.

Hint 4 of 9:

You don't have your friend Feng Li to pull the bell for you here.

Hint 5 of 9:

Use his little friend to help instead.