where all the money is and how much.

Keep an eye on all his bank accounts and keep copies of the annual account statements.

"我說原來那個賬號的錢我都不要了": Bad idea. Be certain never say that again and never ever put it in writing. Yes, at divorce time, all assets will be split in half. He will also have to pay you alimony if you have custody of your child.

You must protect your own (and your child's) financial interests.

If you are not divorcing right away, yes, do open accounts under your own name so that you can access money whenever you want and however you desire.