Polys: 23480
Verts: 23480
Objects : 2
Spline: 1
Fur Hair and Fur using an existing spline ․ To display, turn on the Hair and Fur modifier
I did not delete the spline, it is in the scene and in the obj file. The results when converting Hair and Fur in the "Tools" tab by selecting "Guides -> Splines" may differ slightly.

How to import into a new scene from an obj file so that it works correctly?
1.Import obj, don't forget "Shapes/Lines" checkbox to import splines ․
2. Apply the Hair and Fur modifier on the object
3․ In the "Hair and Fur" modifier, in the "Tools" tab, select "Recomb From Splines" and
select spline ․ Archived Hair and Fur settings ․

Texture. 4k․ BaseColor,Normal(directx),Roughness,Height,ao ․ The turbosmooth modifier was not used․

For correct display: System Units Setup - Millimeters
Rendering > Effects > Hair and Fur > Hair > geometry
If the CORONA version is higher than 1.4: "For Corona render, it is recommended to set the version to at least 1.5, since the glossiness of materials is adjusted with PBR in mind."