The annoying is now people can scream that EDI/Scotland failed to hold on to a Chinese route when so many were asking for it for ages. Hainan didn't give this route any real chance to grow. 2 a week in each direction with the odd Dublin stop over that they weren't always advising people about and at strange times is not doing the market justice.
There most certainly is demand but a more serious carrier is needed. Direct flights, at least 4pw and actuallly advertising the route at this end would have probably increased HUs fortunes but they were simply not interested.