How can I proceed my application for the Z Visa

Hi, im from philippines and currently married to a taiwanese, im not yet a taiwan citizen since it takes time. However I got a job offer in shanghai, and the company seems willing to give me all the necessary documents i need.. and since i hold the philippine passport and not the taiwan passport which makes things harder for me... i need the z visa, where should apply the z visa? Is it in taiwan which is i have already the resident visa or i still need to apply my z visa in philippine since i am still holding the philippine passport?