How much are the lockers in T2 of Pudong Airport?

I think I will need a locker for my case, are they automatic lockers that you pay for by putting cash into a slot? If so, what change would I need?
Or do you hand your bag to an employee and in that case is it possible to pay with a credit / debit card?

How much is it?

Thank you to anyone who takes the time to answer my question.