The low-poly 3D model of the Chinese Great Axe doesn't contain any n-gons and has optimal topology. The archive with textures contains such two folders
Chinese Great Axe Textures 2K: base color map, metalness map, normal map (OpenGL), and roughness map.
Axe Tassel Textures 2K: base color map, metalness map, normal map (OpenGL), and roughness map.