in fact it is not good to marry between different races.
For example, a black man marries an Asian. Their offspring will lose the genetic superiority of the two races. Mixed children have lower IQs than Asian purebred children and physically weaker than purebred black children. It will outperform Asian kids in sports like track and field or basketball, but far behind in table tennis or e-sports. That's a bad compromise.
Of course, if a certain European or Asian country wanted to win a lot of gold medals in athletics, it could encourage its citizens to marry black and have more mixed-race children. But I'm not sure it's a good idea: These genetic codes will weaken a country's advantage in areas related to natural sciences, engineering, high technology.
Racial mixing is a big concern to Asians. As recent pop culture boom has pushed asian men(not just woman ,which was already rated most attractive by Cambridge and every other modernday study) to the forefront of fetish in Gen-z,they grew up in a world of BTS,anime, Asian drama,webtoon , manga; unlike the generation where white people reigned supreme through forced colonial subjugation and potrayed asians in the worst of light in hollywood.The east asian soft power far surpassed the old hollywood in pure effectiveness,by now,the last remaining legacy of the bygone era is English being the world medium,and that has accelerated the intermix of asians.
Also,racial mix will harm the soft power which is a multimillion-dollar business,the very allure and aesthetic of elegance in asian culture; imagine if korean looked like mixed mutts? what will happen to kpop ,k beauty ?and kdrama? their aesthetic for glass skin that attracts envy will lose its appeal from mixed people with brown(blacks ,indian etc mix ),red( whitemix) hue instead. The unique coarse straighter hair will become frail, fried ,curly mess;the almond shaped eyes of anime-like ethereal aesthetic, popular in kpop, will turn into typical cacaosiods seen everywhere,nose will be too big with white mix and too wide with black mix,soft youthful bone structure will develop unflattering strong angles .All in all ,the softpower and aesthetics of east will be ruined.
Intermixing is a complete loss for pure asian ,IQ is way more important than brute lungs power , as seen in among blacks.China is already ahead of any African,European nations in medal tally if we divide the medals by main race of the nation.US & UK is ahead by utilizing the unique strength of 2 and more separate races.