Ancient Chinese secret

I remember that line. :P

i dont believe in china

tnx

Calgon Detergent?

You mean like some of the ancient Chinese espionage tools?
Eavesdrop pot, reverse-cut passwords, potassium alum water concealment tech, unmanned aerial drone, etc. There are also spec ops tools and techniques like special poisons, disguises, and language tricks, on top of things like climbing and hiding.
On the fantasy side of things, don't forget the various mechanized houses, mechanized man, flying machines, and other beast-shaped mechanisms.

You smell like a pregnant Yack!