How was the dance animation made?

There is no way to do this in 2D. It seems that there is a particularly simple software to tie the skeleton can be. But that kind of effortless stuff how can a good animation ah, two-dimensional hand-drawn that is the king ah is the most natural and most smooth and invincible ah.

That is to say, you have to draw frame by frame, should not then guide the Fu shit, but should be made into a sequence of frames imported into AE.

That said, you brought up the question. It's like there should be one way in the world. Without any tools or technical skill, it's like you have to come up with a really awesome effect.