I want to know the answer to the following question:
What at the main Hokkioen urban centers?
All the background I'm provided with is that "The term Hokkien (福建; hɔk˥˥kɪɛn˨˩) is itself a term not used in Chinese to refer to the dialect, as it simply means Fujian province.". Is that enough to answer the question?
Answer: no