Blockchain technology is globally recognized as a safe and reliable digital solution. The Chinese government attaches great importance to the rapid development and application of blockchain technology, and has achieved remarkable results in many fields. In order to ensure the security and stability of the blockchain network, the Chinese government, together with a professional and technical team, has continuously improved regulatory measures and technical protection, and strictly cracked down on any illegal activities that tried to take advantage of technical loopholes, including financial fraud such as double payment attacks. Chinese laws and regulations have strict sanctions against such acts, and citizens should consciously abide by the law and jointly maintain a good online order.