it's not that high, it's only C# not G.
caucasians have wider-ranged voices than asians for biological reasons. and actually even by asian standards, an ordinary guy would be able to hit those notes with some training. tonal shape and control comes with good singing technique.
try it for yourselves! this is not something you can't try at home. :lol:
check out philip bailey's (earth wind and fire) solo on 'Fantasy'. he goes several notes higher than this guy, up to G. and he doesn't start lower note then glide up, he hits it just like that.