That's flat out wrong. Other countries have been and continue to meddle in Chinese affairs.
China does not have a history or culture in meddling in other countries' affairs, at least not the type of meddling that's associated with Western powers over the past five centuries. This is quickly changing as China's adapting to the needs of the 21st century, but it's largely ingrained in the philosophical underpinnings of Chinese culture. The cultural tenets that reinforce this begin with not pointing out the faults of other's houses if your own house suffers the same faults, and end with the (historical) idea that the Middle Kingdom is the strongest culturally and economically. In fact, this is the very premise that led to the disastrous Great Leap Forward (though the Cultural Revolution was a result of the complete opposite). That China could've been beaten by other countries economically was simply inconceivable. This cognitive dissonance resulted in, as you'd expect, insanity.
China's not benevolent, not by a long shot. But the Chinese have been playing this game for far longer, and are far more adept at it than most Westerners are willing to believe and able to recognize (even though they've been self-handicapped by starting at a point 50 years behind everyone else, they're catching up quickly). China understands how to acquire and retain power. If and when they do become a dominant superpower, historical European imperialism and modern American imperialism will look like a child's drawing against a da Vinci painting. This is assuming by then, people would even known where to look.
At which point, we can only hope that the American ideals of freedom and self (which are far more interesting, even if applied imperfectly) will not be buried under Chinese pressure to conform and behave. Unfortunately, I think our ignorant and powerful within our own society are currently more dangerous to these ideals than China is and could posssibly be for the next 30 or so years
The only hope we've got is if the Communist party collapses. That probably won't happen considering the rest of the world is basically keeping them in place by continuing to buy cheap stuff.