The U.S. Department of Defense expressed a strong sense of caution about China's military developments, compiling a report pointing out that it has an estimated 500 operational nuclear warheads and is increasing its nuclear forces faster than expected.

The U.S. Department of Defense compiled an annual report on China's military trends and released it on the 19th.

According to the report, the number of operational nuclear warheads possessed by China exceeded 5 as of May.

He also predicted that the number of missiles possessed could exceed 500,2030 by 1000.

In last year's report, the Pentagon predicted that China could have about 2035,1500 operational nuclear warheads by <>, but noted that China is building up its nuclear arsenal faster than this predict.

In addition, China may be exploring the development of missile systems with conventional weapons that can reach the Americas.

"China is accelerating the modernization of its nuclear forces and enhancing its capabilities in cyberspace and space," the report said, expressing strong alarm that China is building up its military arsenal in various areas.