Deception means that a liar deliberately conceals the truth of the development and change of facts or things and deceives others through tricks and means, so as to make the development and change of things develop in a way (or direction) that is beneficial to him. All the deceived people are deliberate, and they are despicable ways to gain some benefits in political status, economic interests, personal spirit, material and so on through deception, which makes people deceived. Deception is different from military strategy, and they are essentially different.