The idea is of transferring aircraft's from one of your airline to the other without having to sell them in the market then have to re buy them.
Example: Delta Airlines made Song, well Delta transferred their some of their 757 into Song without having to sell the aircraft's.
Well what I am trying to say is that I got an airline in Iraq called (Saha Iraqi Air) and one in Iran called (Iran Air) and there are times where I need to transfer the aircraft's, but I am not able to, and instead if I would like to do that (transfer the aircraft) I must sell it, and someone else might take it. Things like transferring happens in real life, why not here?
Yuxi should add something like that.
Comment below what you think about it!