This one you don't see very often. You have a very good looking trunk developed in that short amount of time since you started growing it.

I've got one of these growing my collection too, and it is about the same age. You must have already had some nice size to it before you rescued it. Hopefully it will become a good looking bonsai. These flower and grow so easily in a confined space.

Maybe I should let the lowest branches all grow super long for a year, to support a thicker trunk.

(This is an old post I am sharing as a reference, so do not bother to upvote it.)
https://steemit.com/bonsai/@creativetruth/flowering-bonsai-attracts-butterflies