What does it mean that people often point to the back?

Finger magic: committing finger magic. People who talk behind the Lord's back are easily framed by villains. If the exam is not satisfactory, there will be a marriage change and the fortune will gradually decline, which will affect the next 4 or 5 years. If you meet Covent Demons, you will be jealous. Fingers and back are not suitable for servant palace and brother palace, and subordinates or peers have gossip about themselves.

References:

Baidu encyclopedia-finger back