Golden Chinese text in damaged shape and rough surface Low-poly 3D model

Nice topology model as shown in attached pictures. I rebuilt text with loop tools and subdivision surface modifier level 1, damaged shape was made with scupt mode in Blender to make sure it looks more realistic. Rough surface was created with roughness image texture made by myself, not by using image textures download from any online store. I created it from Python code, didn't use any texture painting software. So it would be simple enough for many purpose of using, just more than 100k for fbx file.

Chinese text in this model were immitated caligraphy style so they look a little bit different with Chinese scripts in standard form. Images were rendered with Eevee. Render quality as shown in pictures.

Make sure quad only, no N-gon, no triangulates, no vertice with more than 5 edges in model as per CG trader standard, other parameters were verified by Kodama. I also attached screenshot of verification by Kodama for the model. No mark seam while UV editing. However, I got problem with UV overlapping. Total vertices: 1930. Dimension: 45.9 x 69 x 8.4 cm.

Chinese text in scene: 短 = short. In Blender file, I already set up world with blue sky with white clouds, sunlight so it is convenient to make more images in outdoor scene.

Avaiable formats: fbx, glb, obj, stl. Images textures, UV map are in zip files.

Any questions about working process to build these models, any idea to improve models quality, please let me know