information z working visa related rule

Dear sir /madam,

I am Akash from Uttaranchal. I would like know some information z working visa related rule.
Sir, I’m yoga teacher last 7years i’m teaching yoga few week before a Chinese yoga company contact me,They want I teach them yoga studio so I need apply work visa to china,
But I have problem, colure blindness, I m able see all colure but medical method I’m colure blind
So please suggest me what I need do , if this kind case embassy reject visa or give, how many % have chance rejection or get please suggest me Because my work not related any kind colure watch please suggest me, soon as possible , I will gratefully thanks your answer

With regards
Akash