You can apply for work visa at the Chinese embassy or consulates in Philippines according to the consualr jurisdiction. The required doucments are below:
1. One completely filled out visa application form. No item should be blank .
2. One recently taken 2X2 in. photo showing entire face and without a hat on. Please affix the photo to the application form.
3. Original passport with at least 2 blank visa pages and valid for at least 6 months beyond the date of application.
4. Original Foreign Experts Working Permit issued by the State Administration of Foreign Experts Affaris, or orginal and copy of Alien Employment Lisense issued by the Ministry of Labour amd Social Security, or other relevant permit of employment.
5. A Physical Examination Record for Foreigner filled out and signed by a doctor (together with their copis).
It takes 4 working days for visa processing.