Nezha is a heroic figure with a rich mythology in China, and one thing iconic to him are his wind and fire wheels. These are actually a type of ring-shaped hand held weapons, but Nezha is often depicted flying around by standing on them. His Digimon, then, a cyborg boy with huge motorcycle wheels for lower legs, which is a pretty fun interpretation! He also has a helmet, covering all but his mouth, that resembles a golden lotus blossom while evoking spiky hair. The mask over his eyes, or whatever you would call that, is also interesting because it's modeled to look like the bullet chambers of a gun, but in this context, that also resembles a slice of lotus root, or perhaps a lotus seed pod. That's honestly really clever!

It works really well as a combination of Vulcanusmon and Beelzemon, which is how you get Nezhamon in New Century.

He's also got an alternate form, Crimson Mode, were his wheel feet transform into a full size giant motorcycle, though I have to say that's not nearly as interesting.