do i need to get tourist visa if one of my friend invited me to go to china?what are the requirement

Yes, invitation letter is required for L application if you were invited by a friend. But if you visit China for the first time, bank certificate of deposit balance including the past 6 months history of your bank account and the receipt for payment of this certificate, BIR-stamped income tax return form, letter from your employer detailing your salary and the length of your employment, business registration certificate if you are the owner, professional ID, etc. A letter of explanation is required if you could not provide the above-mentioned documents.