A good achievement, but pointless.
No airline would route HKG-LHR going east, currently they cross N. Russia.
They should have tried something that long that there is a actual need for route wise, like Auckland to London, or Seoul to Buenos Aires.
I beg to differ. The route is irrelevant.
The big deal is that it is a twin engine aircraft and it flew for so long and so far. There are different flight rules for twin and four-engine aircraft. Twins must stay within a certain distance, en route, of an emergency landing site should an engine fail. This is a push to qualify twin engine aircraft to be certified to fly the more expensive four engine routes. Four engine ac's being more costly to acquire, maintain and fuel.
This is a remarkable accomplishment for two engines. Of course no news from the MSM yet.