Angelina Jolie, Lucy Liu, Jackie Chan and Seth Rogen do not reprise their roles, mainly because their related characters are depicted as their younger selves.

[1] Master Shifu instructs Po on how to teach an introductory kung fu lesson to a group of rambunctious bunny children.

Po tries to teach the kids that combat is only part of what kung fu is about; its true meaning is "excellence of self".

To illustrate his point, he explains the Furious Five's individual backstories, and the basic philosophical concepts that enabled them to be great kung fu masters.

Shifu returns, anticipating finding a lack of progress, and is surprised to see he has underestimated Po's talents again.