Originally Posted by
lo2e
I don't have a specific answer to your question, but I almost never recommend booking any sort of flight on an OTA, because if something weird happens it is much, much easier to deal directly with the airline than it would be to deal with both the OTA and the airline (and most times in experiences we've seen posted here, neither one wants to be helpful in these sorts of situations).
If it were me, I would just wait until MU's website lets you book it and do it there, even if the price is higher.
I'm guessing that you haven't dealt with Chinese Eastern customer service.