The old joke goes: "What's denial?" Answer: "A river in Egypt." Apparently it now flows through China too. Here's a taste from Global Times:
The absurd allegation that a Chinese military unit is behind cyber attacks against the US government and firms continues to ferment. The US has staged a performance so beautifully planned that the Chinese are finding it hard to grasp Washington's real purpose.
If that reflects Chinese official reaction this is going to be one hard problem to solve.