Realistic glass refrection or crystal shader in blender 3.0 eevee

this how to make an realistic glass or crystal shader in blender 3.x. Demo file on my gumroud is free just type $0 for download or any $ you want to support me. Download link to demo file. https://imarioliang.gumroad.com/l/exthc Download link to HDRI texture. https://polyhaven.com/a/studio_countr... My Instagram   / imarioliang