You would think people would know better but if you ever get bored and decided to browse clearance rejection decisions you see dozens of people losing their clearance each year because they looked at porn on their work computer.
Actually when you get denied a clearance they give you a statement of reasons (SOR) in your rejection letter which you have a certain period to rebut. (I think 30 days?)
It sounds like you just don't understand how security clearances work.
Its about allegiance to a country. Not your race.
If you come to the US from China, revoke your Chinese citizenship, become a US citizen and limit your contact to Chinese citizens, you can get a security clearance.
There isn't some hard rule like that. If you have no family connections to china, moved over to join some cool company, then came back a year later because you got bored, your interim clearance would probably be denied, and your background investigation would probably take longer but you could still get a clearance.