30k Poly is considered to be low poly or high? for one mesh

It depends on models, Chair or other furniture with 30k polys is highpoly.
Complex city model or heavy vehicle model with interior (train, airplane etc.) is low-poly.

So this is high poly, low-poly model doesn't have so dense mesh.
But it is really nice model. ))

Hi, all my models only for 50%

Hi, all my models only for 50%

This should be low

low

The number of faces is not high

for what the model is, I would consider it high poly. Looking purely on number of faces is not enough to determine if a mesh is high or low poly, e.g. a perfect cube only needs 6 faces, if you are looking for a low poly perfect cube you wouldn't look for one that's got say 96 faces.

I wouldn't take xukai and vagrancy seriously, I believe they are the same person, similar models and they always reply in the same thread with a lot of nothings.