Should i restart this chinese elm?

[zita]

waiting for the pic

 

[Shibui]

and I understand there are two ways to do it: a long branch with several secondaries, or producing two new branches every two internodes. Which is the best way for a Chinese elm?

Not sure what the second way means. In general, try to avoid having 2 branches (plus the main branch =3) at any point. That invariably leads to swelling where 2 side branches grow from the branch or trunk.
If you can manage to make it happen, a new secondary branch every so often along the main branch. First image in your attachments. The image shows a relatively straight branch (maybe just for clarity?), which would be OK on a tree with straight trunk. I try to build a branch with some movement more like toward the end of that illustration. Degree of branch movement should reflect the degree of trunk movement as whatever forced bends into the trunk does similar to branches as they grow. Remember that movement in trunk and branches should be 3D - some up, some down, some left, some right rather than all bends side to side.

As mentioned earlier, Chinese elm have a different growth pattern from many other deciduous so a different branch pattern can be appropriate. Chinese elm branch pattern can be more like broom style trunk pattern - main branch splits into 2 or maybe 3 which all continue to split into 2s to make rounded foliage pad.