The GP post explicitly mentioned the growth of Chinese research capability that they directly saw. It's no secret that China has explicitly and deliberately invested in ramping up R&D.
Also, requiring absolute proof in a system as vast and complex as R&D at the scale of the US leads to complete paralysis. It's a bit like cutting off your fingers because you want to lose weight.
It would be interesting to see some discussion of how the Chinese research funding system actually works.
That makes the opposite point since Chinese indirect costs are 5-25%. e.g. this grant is at 25% https://www.nsfc.gov.cn/publish/portal0/tab434/info94303.htm