Two sides: male side and female side; The positive side is a smiling tiger, and the negative side is a sinister face, which is the so-called bait hides the hook.

Three knives: soft knife, hard knife and dangerous knife; Soft knives kill people without bloodshed, hard knives kill people without mercy, and dangerous knives are hard to prevent; Hard and soft, plus insidious, kind people are hard to deal with.

Metaphor is malicious, face to face, behind a set of smiling faces: smiling tiger, chameleon.

Trust gives everyone a chance. If you give up, don't blame the world for injustice. It is your urging that destroys the fragile trust in the world, and it is also your chance to lose your true friends.