Like many of the reviewers I thoroughly enjoy this odd Chinese animation. It is well animated and the sound track is particularly enjoyable. I watched this animation numerous times throughout my childhood without recoiling at any of the 'shocking' scenes nor considering it particularly 'disturbing'. That being said, I remember when I first went to University I showed the animation to a few friends and they found the animation to be very disturbing for an animation that children would have watched.
Given this, I would recommend any parent watches Nezha before allowing their kids to watch it. If you were okay with uncensored Dragonball and other Japanese animes then Nezha should be no problem.
I would thoroughly recommend it though - very enjoyable film, and highly memorable.