Difference between Panda Experience and Keeper Experience?

Planning to visit the Panda Base early October this year with my gf, she's crazy about pandas. Seems there are two type of Experience "Panda Experience" or "Keeper Experience" available there. Anyone can tell me what the two different Experiences involves? I know the "Panda Experience" is RMB2,000. Anyone can tell me what's the cost for the "Keeper Experience"?