Start training early on because as you probably already know the plant is a rambler climber and tends to grow long leggy straight branches.
If you start them off early enough in regards to Bonsai training then anything is possible, this one was found naturally twisted around a small tree that had died.
They do tend to be quick growing so getting the pruning right for best flower to growth ratio is critical.
You can easily end up with a plant that is not flowering but the growth is very long and lanky.
Follow nature, work out when the plant flowers naturally then make sure you have pruned well before that date, but not too early on.
The one in the picture is about 2/3 weeks away from flowering.
It was gathered from the wild, growing wild (grows as a weed) in southern China.
The locals in these areas in order to make some money go out onto the mountains gathering up anything that they think they can sell. I think I paid about 50 RMB for this one. Exchange rate at the time 12 RMB to the English pound, about £4.