if the interest is fixed, then don't pay off the student loans (you be insane to pay it off). your monthly payment is really low plus student loans have added protection if you loose your job, student loans can be suspended under "hardship" and then you can sign up for the income based repayment program. (so its a no brainier)
if its not fixed, its your call.
(1 major factor would be based on your job being civil servant 10 year vs 25 year) i would still side with not paying it off because of the added protection of income based repayment and plus if you loose your job, you can have the payment suspended and not effect your credit score.
as for silver, by like 1,500 of silver and 1,500 of RMB