Baggage allowance for Los Angeles, CA - Guangzhou flight? PLEASE HELP ASAP...

Okay so my flight is tomorrow, and I'm still a tad confused about the baggage allowance. Right now, I have a check in baggage weighing 49lbs and a carry-on weighing 10lbs and a purse. I've heard of some horror stories concerning extra baggage fees charged by China Southern. And I can't afford to miss my plane. Please I need some answers.