What is the fine-grained topic of the following text: Participants exchanged views on China’s military reform and defense policy; maritime issues in the South and East China Seas; U.S. deployment of the Terminal High Altitude Area Defense (THAAD) anti-missile system in South Korea; cross-strait relations; and other issues of mutual interest such as North Korea, cybersecurity and counterterrorism. Only return the topic.
Discussion on China's Military Policy and Related International Issues