Bad geometry and intersections detected

[Kartini Ganesha]

Dear everyone

I encountered a problem where I'm trying to import a 3d model that I imported to Blender from Rhino. I have checked the manifoldness in Rhino and it seemed to be fine. As shown in the image. But, when I converted to the GEOM and checked the sanity and intersections, it was found that there were bad geometry and intersections. 

My question is how to trace and fix it? I tried to utilize the re-mesh sidebar, it worked after I refined 2/3 times using Voxel Remesh, however, the intersections still exist. 

Or do you have any recommendations on it? I also attached the file in any case if anyone of you wants to take a look