Submission review of shophouse mock up

My first 1:50 mock up model after the moodbox…
This is actually almost the same as the 1:100 shophouse mock up which is to use columns to support the whole shophouse…
There is a hole in the centre of every storey to allow natural lighting to come in…
The only different is the staircases…
For the 1:50 shophouse mock up the columns itself is the staircase…