1. Desire temptation: Liars usually use people's greed, fear, curiosity and other desires to make the victims fall into the trap unconsciously and be deceived.

2. Information asymmetry: Liars usually have more information and resources, while victims lack the necessary information and knowledge and are easily deceived by scammers.

3. Psychological function: Liars usually use the psychological weaknesses of the victims, such as inferiority, loneliness and anxiety, to control their thoughts and behaviors.

4. Deception: Liars usually use various deception means, such as false propaganda, forgery of evidence, impersonation and so on. Make the victim think it is true and be deceived.

5. Social factors: The social relationship, cultural background and income level of the swindler and the victim will also affect the success rate of the scam.

In order to avoid being deceived, we should be vigilant, raise our awareness of self-prevention, learn to identify scams, avoid trusting strangers, and strengthen our own information collection and knowledge reserve to avoid falling into scams.