Types of Spies-Sun Zi

From World's Chinese Wiki

Types of Spies by Sun Zi

English: There are five kinds of secret agents that can be used. They are local agents, inside agents, double agents, doomed agents and live agents. When these five types of agents are deployed simultaneously, their complex modes of operations will be beyond comprehension of the enemy. They are like mythical and divine schemes that can be deemed the most precious treasures and weapons of the ruler.

Modern: 使用间谍有五种：有因间，有内间，有反间，有死间，有生间。物种间谍都用起来，能使敌人不知道我方用间的规律，这是它神妙之处，国君胜敌的法宝。

Original: 故用间有五：有因间，有内间，有反间，有死间，有生间。五间俱起，莫知其道，是谓神纪，人君之宝也。

Business Application:

From: Sun Zi Art of War Chapter 13