Complex sentence: Since then, USJ has expanded into 29 sections, i.e. USJ 1 to USJ 29, sitting on a freehold land except USJ 1 and USJ 3D.
Split into simpler sentences: Since then, USJ has expanded into 29 sections, i.e. USJ 1 to USJ 29. Most of the areas in USJ is sitting on a freehold land except USJ 1 and USJ 3D.