Guardianship Letter

Hello, please I'm applying to a University in China, and It says that because I am below 18 years(I am 17 years old), I need a guardian. Please can the Embassy in China help with this?
I contacted the University concerning this, and it said I should form a guardian certificate by myself and carry it to the Embassy for Notarization, How about the guardian in China? How can I get such? Please, Thank you for you for your time.