Yes, you need to submit all the requirements as what you did last time, in addition, you need to provide your previous China visa. The Chinese embassy is located at Makati City, Metro Manila.

No you dont need to submit all the requirement since its not your first time visiting china. These are your requirements
Tourist/Family Visit Visa (L)
L Visa is issued to a person who comes to China for sightseeing, visiting relatives, or private matters. Documents to be included with application:

1. Applicant's passport with blank pages and at least 6 months validity left before expiration.
2. A truly and completely filled visa application form affixed with one passport-size or 2x2 colored photo, with white background, full-face front view, and no hat. Photo must be glued on the application form. Stapled pictures will not be accepted. Scanned photos will also not be accepted. U.S. passport holders must submit two application forms with two photos.
3. A copy of the round-trip plane ticket
4. Hotel reservation / invitation letter with a copy of the inviter's valid chinese residence visa and passport information page of inviter's or Chinese national identity card.
5. Previously used China visa in old or new passport (Only visa stickers will be accepted. Those with stamped visas must submit additional documents for first time China visa applicants. Please refer to the list below.)