Now I’m wondering what if a 5”8 half japanese half taiwanese male comes to audition as a face character what character could he get?
As a male with Asian characteristics, your best bets are Shang from Mulan and Hiro from Big Hero Six. Both are very rare and the last one can also be portrayed as a fur character. So your chances are even slimmer.
What you could look into if you really want to perform at Disney is either as a dancer in a parade or show, or go for a fur character. This is an old list and I don't know if it's up to date, but it gives an indication.
4'6" - 4'7": Daisy, Donald
4'8" - 4'9": Daisy, Donald, Dopey, Jiminy, Mickey, Minnie
4'9" - 4'10": Daisy, Donald, Dopey, Jiminy, Mickey, Minnie, Pinocchio
4'10" - 5'0": Mickey, Minnie, Pinocchio, Brer Rabbit, Meeko, Piglet
5'0" - 5'2": Max, White Rabbit, Pooh, Robin Hood, Timon, Bashful, Grumpy, Sneezy, Sleepy, Scrooge McDuck, Terk
5'1" - 5'2": All of the characters listed above in the 5'0" to 5'2" range, plus Chip, Dale, Suzy, Perla.
5'2" - 5'4": Doc, Gideon, Happy, King Louie, Suzy, Perla, Chip, Dale, Jessie, Bullseye, Penguin
5'5": Mr. Smee, Lagoona Gator, Ice Gator (not much for this height!!)
5'6" - 5'7": Friar Tuck, Mr. Smee, Pluto, Rafiki, Wendell, Buzz Lightyear, Flik, Lagoona Gator, Ice Gator
5'7" - 5'8": Rafiki, Eeyore, Pluto, Prince John, Wendell, Friar Tuck, Buzz Lightyear, Flik
5'8" - 5'9": Prince John, Brer Fox, Eeyore, Shaker, Tweedles, Liverlips, Dumbo
5'9" - 5'10": Liverlips, Tweedles, Shaker, Brer Fox, Geppetto, Dumbo
5'10" - 5'11": Geppetto, Sherriff of Nottingham, Foulfellow, King Lion, Tigger
5'11" - 6'0": Foulfellow, King Lion, Sheriff of Nottingham, Tigger
6'0" - 6'2": Baloo, Big Bad Wolf, Brer Bear, Captain Hook, Genie, Goofy, Launchpad
6'2" - 6'3": Baloo, Beast, Brer Bear, Goofy, Woody, Jafar, Launchpad
6'3" - 6'4": Beast, Jafar, Launchpad