Past tests of the glide vehicle were clocked as reaching an estimated speed of Mach 10, or 10 times the speed of sound—around 7,680 miles per hour.
Such speeds create difficult aeronautics and physics challenges for guidance systems and place extreme stress on materials used in construction of the vehicle.
The annual report of the congressional U.S.-China Economic and Security Review Commission, made public Nov. 20, reveals China’s hypersonic weapons program is a major development effort.
The report said the People’s Liberation Army “is developing hypersonic glide vehicles as a core component of its next-generation precision strike capability.”
“Hypersonic glide vehicles could render existing U.S. missile defense systems less effective and potentially obsolete,” the report said.

http://freebeacon.com/national-security/china-conducts-third-flight-test-of-hypersonic-strike-vehicle/#ixzz3Kzuio5dI