Answer:
In the 21st century, China has been actively modernizing its military and expanding its capabilities. One of the key areas of focus has been the development of a blue water navy, which is capable of operating beyond the country's immediate coastline. China has also invested heavily in developing advanced missile technology, including anti-ship missiles and ballistic missiles that are capable of striking targets as far away as the United States.
In addition to its military modernization efforts, China has also been involved in several territorial disputes in the South China Sea and East China Sea. These disputes involve competing claims to various islands and maritime territories, and have raised tensions between China and its neighbors, as well as with the United States.
China has also been involved in peacekeeping operations in several countries, including Sudan, South Sudan, and Mali. Its military has also been involved in humanitarian and disaster relief efforts, such as after the 2008 Sichuan earthquake and the 2013 Typhoon Haiyan in the Philippines.
Overall, China's military issues in the 21st century reflect its growing global ambitions and its desire to protect its strategic interests and expand its influence in the world.
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