Let GUI.TextBlock change with mesh coordinates,How to do it?

Babylon.js - GUI demo (babylonjs.com)

Just like sphere1~7 here

I am not familiar with many of them recently, so I have many problems. Thank you very much for your help. My English level is not good. Please forgive me for my poor expression

linkWithMesh(mesh),How to get the UI link with the mesh?

This is exactly what the doc above is describing. Not sure to understand the question ?