Never ask for a free lawyer.

Never ask for a free lawyer (Duty counsel). They are so cheap that they will send you to jail. Find a good lawyer now and have his telephone number in your pocket, call him when police arrest you. This is the best way you can do now. You can talk with a lawyer for free for the first half hour.

If you still want to stay at here then find a lawyer. Or you just go back China. This is not a big deal if you just take stuff from store without consent.