Welcome Jootat !     

Please post up your photos for sharing. 

Welcome Jootat,

If i'm not wrong, we plant them in a deep pot until we get the bonsai material we want, trunk size..etc.. then we repot to bonsai shallow pot by pruning the root for training.
Trunk and nebari first , then the upper part, branches and shape/style later when you got a good base.

Am i rite Bonsailelong?

Hi Jootat,

If I'm not wrong the first photo of "shui mui" you bought is from Sanfong. I've seen quite a lot of this shape there.
It's already 80% done, However I suggest you look into the wiring at the main trunk. Any sign of "eating in", if so
unwire only the main trunk wires.
Another suggestion is that don't put any stone or rock above the soil, in a long run, the weight of the stones or rock is not only
compacting the soil but will also result uneven grow of roots which in turn affect uneven grow of foliage.

For this one which you trained yourself, You are doing a good work.
I suggest you give it a little touch up.

[attachmentid=3299136]

Re pot your " shui mui" in a higher pot, plant it vertical, cover the small exposed roots, leave the big one exposed.
cut the big branches indicated in order to give your tree a balance look. Then cut the top layer of branches shorter, let it have a cone shape image,
wire and pull the lower level of branches a bit lower and let it grow for sometimes before doing further improvement.

Well, you can re pot any time convenient to yourself.

For the "shui mui" that you bought from sanfong, I suggest you maintain it in this shape constantly.
That means any branches grows out of shape got to be cut away.

[attachmentid=3300310]

This "shui mui" might have a decent trunks and branches but lack of nebari.
If you are willing to try, you can follow my suggestion.
Uproot the tree carefully, cut away the centre main roots, leave all the side roots.
Put a layer of soil at the bottom of the same pot, then place a piece of flat  stone right
at the middle of the pot and place your tree right on top of the stone. Then spread out the side roots evenly
and put back the soil. Your pot might be a bit big but it's good for nebari training. Don't worry, your "shui mui"
won't die easily.

[attachmentid=3300332]

If I find time I'll try to do and post a photo series for the bonsai tree nebari training for sharing.

Try Sanfong Bonsai Nursery at Semenyih.