Great idea, super proposal -- and it just won't happen --- for reasons why please refer to the beginning of the sentence
Seriously, like someone already mentioned, as soon as the govt agrees to this - politicians, bureaucrats, Mujahideen, environmentalists, Mullahs and all variety of "stake holders" will appear, the price of the land will sky rocket, and everybody else will have ot be paid off -- the politicians will want contracts for their "firengi" friends, the domestic companies, will charge even more than the firengi companies and the Chinese will learn things about Pakistan that no Chinese should want to know about anywhere -- China promised to never, never give Pakistan Aid - help Pakistan, but make the idea Pakistani or every Pakistani will be ready to have his and her account and their foreign account as well, filled to the limit with the largess of the hard working and money saving Chinese.
So Chinese friends should not take offense, we know they only wanted to help - but Pakistan does not work like a normal country, it has it's own "unique" method of functioning.