Ransomware attacks are increasingly common globally and represent one of the most significant，and growing，international cyber threats in 2021. The vulnerabilities exploited by the hackers make an increasing impact in public or private sector. Pegasus spyware espionage shocked the world and highlighted the hidden dangers of application security. The spread of malicious programs is still rampant，and the security of mobile Internet needs to be strengthened continuously. The number of security vulnerabilities continues to rise，and the ability of Internet enterprises to protect the network according to law needs to be improved immediately. Relevant departments have intensively introduced new laws and regulations on network security governance in last year，and the rule of law system for network security governance with Chinese characteristics has initially taken shape. The Cyber Ecosystem has been purified，and phased achievements have been made in APP governance. Looking forward to 2022，the construction of mobile Internet Security and rule of law will be further strengthened；network data processing and personal information protection will be more refined and standardized.