Why are there no Chinese girls in DIsney Channel shows?

since i was little, i loooved Disney Channel shows like suite life of zack and cody, wizards of waverly place, hannah montana, etc. but since then, ive noticed that there are practically NO chinese, well asian (as in yellow skin like chinese, korean or japanese) on the shows. everyone on the shows is white, or black. there are now more black stars, but what about chinese, korean, japanese? well, there ARE chinese, korean, japanese boys (not many, but there are some, maybe like 2 or something,) but there are NO girls at all!! i dont get it! what is it that disney channel has against asian girls? btw. brenda song isnt asian. she's laos so thats not rly asian. just saying.