At the beginning of the 21st century, what security threats have the greatest impact on China?

Non-traditional security threats. Non-traditional security threats, mainly refers to the human society in the past did not meet or seldom seen, these years gradually come to the fore, occurring outside the battlefield with one or more other countries interacting with each other, and to their own country and other countries, and even the survival and development of the region and the world, national security and social stability can constitute a major threat to the security problems arising from the non-military and political conflict in other areas. Non-traditional security threats are transnational, multifaceted, sudden and interactive. At the beginning of the 21st century, China faces many non-traditional security threats, including terrorism, cybersecurity, environmental issues and economic threats. These threats have not only affected China's development, but also posed challenges to global security.