hi, i have a Chinese friend in shanghai, can she send me an invitation? how?

Yes, your friend in Shanghai can send you an personal invitation which must include your full name, gender, date of birth, purpose of visit, date of arriving and leaving China, place of visit, relations between the applicant and the inviter, financial support during stay in China and the inviter's name, contact number, address and signature.

She also need to provide copy of her Chinese Id card for you to apply for the China visa.