"Two explosive reminders that the US and China are in..." Topic

… a hypersonic arms race.

"The test of a rocket-powered glider called the Advanced Hypersonic Weapon (AHW) failed when US Army engineers ordered it to self-destruct after its launch went wrong early on August 25. The explosion left debris scattered across the Kodiak Launch Complex in Alaska:

The destruction of the AHW is the second setback this month for world powers developing weapons intended to traverse the globe in the time of a reasonable daily commute. On August 7, a People's Liberation Army test of a hypersonic glider (known to the US military as WU-14) failed when it broke apart shortly after launch, according to the South China Morning Post.

This US AHW is part of the Department of Defense's Conventional Prompt Global Strike plan, which would equip the US with the ability to hit any target on earth in as little as an hour. The AHW can travel at up to 10 times the speed of sound; in its first test in 2011, it flew 2,300 miles in less than half an hour from a launch site in Hawaii to a target in the Marshall Islands…"
Full article here
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Amicalement
Armand

Given the Chinese plane is probably as a result of hacking US designs, if that plane has a flaw it will naturally have been replicated in the Chinese design.

Actually it probably isn't. There may be some "input" but then again it would probably be true to say that Western projects probably benefit from similar "input" from elsewhere. From what I've seen of Chinese scientific research and development its rather better than some readers here would think.