I heard there is a bond but not many people pay it. Tends to be an individual thing. The amount and payment depends on how good a negotiator you are. HOwever, most previously non type rated pilots will stay on a few years to build up the hours anyway so everyones happy. EVA gets the needed copilots for a few years and always has many eager to join to replace those that leave.
Heard the training is first class and the jets shiny and new .