So basically there's a multitude of factors, I'll just do quick bullet points. My colleague did a similar topic as his sociology PhD. Dissertation so here's the gist:
[*] The Chinese has a long tradition of polygamy, the privileged always had more options.
[*] The society nowadays has higher toleration, the concubine of an elite is valued more than the wife of a commoner.
[*] Fresh talent is trained and traded among the Chinese elites at NBA/MLB rates.
[*] The ratio between Chinese male and female has become radically discombobulated.
[*] The Chinese industry has become extremely streamlined and efficient, with certain cities achieving global status.
Moreover, locally speaking
[*] It is harder to come to the US as a Chinese citizen on any visa.
[*] The Korean has a long history of providing top services that predate back to WWII.
[*] T̶h̶e̶ ̶K̶o̶r̶e̶a̶n̶ ̶L̶o̶r̶d̶s̶ ̶e̶r̶a̶s̶e̶d̶ ̶a̶l̶l̶ ̶C̶h̶i̶n̶e̶s̶e̶/̶J̶a̶p̶a̶n̶e̶s̶e̶ ̶p̶r̶e̶t̶e̶n̶s̶e̶ ̶f̶r̶o̶m̶ ̶t̶h̶e̶ ̶t̶e̶r̶r̶i̶t̶o̶r̶y̶ ̶a̶n̶d̶ ̶e̶s̶t̶a̶b̶l̶i̶s̶h̶e̶d̶ ̶t̶o̶t̶a̶l̶ ̶c̶o̶n̶t̶r̶o̶l̶.̶
[*] The Chinese uses different methods of communication. QQ, wechat and print media.
PS. Your DLV and insufficient EQ wont get you far. Stahp it~