That's very smart way of conditions they keep isn't it? Giving technology and want to procure material from their country only so total spending will be for their market itself and in return we can get high end technology and metro services.. And finally pay loan for what we spent on procurement of their material, technology and installation, commissioning costs.. They giving loan to us with helping their market to sell material to our country metro services.. We also should learn such business and financial things whenever we try to execute any abroad projects of our country..