The "Chongqing - 3D City Topography Terrain 3D Model Pack purchase" 3D asset is currently listed under the authorship of "Unknown author".
You can download this asset for free at "Unknown platform" by following the link.
This specific 3D model is provided under the "Unknown license" framework.
MAX (Autodesk 3ds Max, filesize: 400 MB), BLEND (Blender, filesize: 165 MB), OBJ (OBJ, filesize: 104 MB), FBX (Autodesk FBX, filesize: 171 MB), MAX (Autodesk 3ds Max, filesize: 400 MB), C4D (Cinema 4D, filesize: 153 MB), MA (Autodesk Maya, filesize: 16.8 MB), GLTF (glTF, filesize: 16.8 MB), 3DM (Rhinoceros 3D, filesize: 260 MB), 3DS (3D Studio, filesize: 16.8 MB), DAE (Collada, filesize: 16.8 MB), DXF (DXF, filesize: 16.8 MB), LS10 (Lumion, filesize: 16.8 MB), RFA (Autodesk Revit, filesize: 16.8 MB), SKP (Sketchup, filesize: 363 MB), STL (Stereolithography, filesize: 16.8 MB), TM (Twinmotion, filesize: 16.8 MB), UASSET (UnrealEngine, filesize: 16.8 MB), UNITYPACKAGE (Unity 3D, filesize: 16.8 MB), PDF (PDF, filesize: 16.8 MB), DWG (AutoCAD, filesize: 16.8 MB), OTHER (Other, filesize: 1.8 GB)