China's air travel sector is banking on continued growth. One of the biggest problems facing any airline is the cost of fuel. China's additional hurdle is the mere availability of fuel; it must seek oil exploration deals abroad. Middle East unrest is getting worse and will make oil prices very unpredictable for months. Libya's production is increasingly at risk of destruction and its eventual resumption is very much in jeopardy.
Blanket bets on ever-expanding air travel are no sure thing in this kind of environment. Boeing should hope that rising fuel costs don't price its airline customers out of future sales.
Full disclosure: No position in BA at this time.