1. Hackers steal other people's virtual property through network viruses. Generally, it is carried out in the back door, without the procedure of the stolen person, which is fast and can spread across regions, making the detection time longer.

2. The netizen cheated. Generally speaking, it refers to the way to make friends online, get to know real people or networks, gain the trust of the stolen people and obtain property information. Slow speed, but slow detection speed.

3. The online Ponzi scheme. Generally speaking, it refers to people who get rich quickly through false propaganda on the Internet, organize people who have no Internet work experience, and use online advertising and other means as gimmicks to curb membership fees for fraud.