Yes China is big, yes china is (still) growing fast, yes China wants to be more powerful on the world stage. And yes, China raises some challenges/risks to the western/OECD countries. But the level of the risks as they are today and in the near future are significantly overblown because to do so is useful to those who bang the drum.
And china itself faces many internal structural risks which are underweighed (or flat out ignored) both by those who want to tout China as a risk and by the Chinese government itself.
My favorite deal of the 1980s (1990) was when Martin Davis sold Pebble Beach to a Japanese developer. This was widely described in the press as evidence that the Japanese were about to take over the US (OMG the real estate value of the imperial palace exceeds the entire real estate value of California!!!!). Of course a few years later it was back in the hands of its original owners, the Pebble Beach company, for less than the Japanese buyers had paid. Now one story doesn't make a trend, but this high profile one is indicative of the situation. Some low-publicity slow-and-steady purchases have done well and the same in reverse (US companies in Japan). I expect the same with China.