How can we get to see baby panda close up? In Chengdu

A tour agent in Singapore is offering a tour to the Panda Centre which includes working for a few days at the base learning to prepare food and clean the enclosures of the panda. Just wondering whether there is really such a thing and would we get to see the panda close up, especially the baby panda?

Is 30May to 3Jun a good time to visit the Panda Centre? What will the temperature be like?

Tks