Please help me with my loquat tree!!

Hey so i have a loquat tree about three yr old and its very bushy however last year i accidently tore into some of the main stem during pruning.
The growth on top of the injured bit is growing but not as vigorously as before so i wanted to completely get rid of the damaged part and start again.
My question is if i was to cut below this part would the plant die from shock since all the leaves are above? Thanks.

Plant is in a 20L container. It has no leaves or any buds that i can see below i wanted it to form into a bush so i removed all growth below and left about 4 branches

 

I've only got a small one of these planted last spring, but I do find them pretty vigourous so I'm fairly sure it would shoot from the cut back stem.
And now would be a good time to do it.

You just need to hope there are some dormant buds.

 

Thanks have made the cut hope it makez it