This is the Air China “Smiling China” livery.
(Photo link: https://pixels.com/featured/air-china-boeing-777-39ler-b-2035-smiling-china-los-angeles-international-airport-may-3-2016-brian-lockett.html)
Before you say it, I am fully aware that there is a feature request on the normal Air China B777-300ER however, since we already have that livery on the 789 and 748, I thought it would be nice to change it up a bit and request a special livery. Personally I think this livery looks a bit better than the normal Air China livery and I think it would be a great addition to the 77W after the rework. There should also be more Asian/Chinese liveries in IF for trans-pacific & trans-continent flights between Asia and Europe. Anyways here are some info on the 77W and Air China. If you like this livery and wish for it to be included in the upcoming 777 rework, please vote for it on this thread.
Air China: https://en.m.wikipedia.org/wiki/Air_China