Have they looked inside a tech company office before? Have they seen how many Chinese immigrants/second generation Chinese Americans power high-tech US tech companies? Do they think that only the Chinese people in the US can innovate? And that once they're in China, they lose that ability?
Or have they read a science paper recently? China's universities dominate the Nature Index for high quality science output: https://www.nature.com/nature-index/annual-tables/2023/insti...
Heck, just read any science paper from top US universities. There's a good chance that one or more Chinese names are on it.