China's 1-child policy overpopulated their country with men, who were selected as the child. This was folly, as Chinese women tend to be more interested in white men, thus their male population is forced to get with Indian or other women resulting in cultural destruction
Bro just a very slight correction since things are slightly different now.
Chinese woman who migrated or moved to EU or North America will 90% prefer white men, especially those that are second or 3rd generation.
Between the opening up of China from 1980 up till the mid 2000s and early 2011 or 2012. The amount of Chinese woman going after the American dream or EU dream and local China Chinese who prefer white man are as high as 90 to 95%.
The reason is very straightforward because the country was kinda poor and the memories of the communist repression is still extremely fresh given the fact that their parents suffered a lot too.
So what you said is without a doubt 100% true for that period.
And this is not just China, even Hong Kong which is extremely wealthy, Hong Kong Chinese girls preferred white men (Canadians to be specific)

.
Even Singapore from where I came from, English educated country with a majority of ethnic Chinese also prefer white boys.
My experience working in Shanghai for business trip and my experience in Hong Kong have shown me this.
When I was in night spots in Shanghai back in 2005 / 2006. The amount of Chinese girls surround white expats in their night life is immeasurable.
In Hong Kong , a famous night spot called
Lan Kwai Fong back in the mid 2000s and mid 90s, the amount of HK Girls that surround white boys are ample as well.
Lets not talk about South East Asia, Philippines , Vietnam, Cambodia and Thailand, the woman literally would bleed for white boys.
Fast forward to where we are now, the China Chinese, especially in Major Cities, Shanghai, Beijing, and the Shenzhen area, no longer prefer white boys.
There are those in Hong Kong who still does (prefer white boys), but they would prefer Japanese or Koreans rather than white boys due to Korea / Japanese soft power via media and entertainment.
And China boys seldom take Indian woman. Those from the really poor rural areas will probably just die off alone.
There is a huge influx of mix marriage between Chinese and Ukrainians / Russians though, these are actually quite well documented.
It is also quite difficult to destroy the Han culture although not impossible.
There was two major period where the Han Chinese was completely controlled by foreigners one was the
Yuan Dynasty where the Mongols completely controlled China for a few hundred years ( But they were integrated and use Han language).
The second period was the Qing Dynasty ( Manchurians ), they also controlled the Chinese for a 3 to 400 years and they were also integrated and used Chinese language and writing system.
Last but not least China was also controlled semi conquered by 8 countries during the 2 opium wars but not completely namely by Britain, USA, Germany, Italy, Russia, Japan, France and Austria - Hungary Empire.
But they still kept their language and culture.
Most foreigners who marry in will have their original culture sinicized and not the other way round. Just like how migrants who migrated to the western hemisphere will get Americanized sooner than later.
The only possible cultural destruction that I can think of is if there is a radical religion (Islam) going in and taking over and destroying everything.
There is no such thing as never, but to culturally destroy China is quite difficult.