Today, the Yantai Cyber Police inspected the law enforcement public account and issued a statement saying that recently, the "blockchain" has been frequently named, and it has become a hot topic for discussion. The blockchain is a computer for distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithms The new application mode of technology is an important concept of Bitcoin, which is essentially a decentralized database. However, criminals have also identified "business opportunities" and carried out scams in the name of blockchain technology. In particular, various types of frauds using virtual currencies are invincible. The Yantai Internet Police reminded the general public that investment should be rational and that risks should be prevented.