Flight to East Asia is an Aviation riff from the inimitable Amy Traynor at Moody Mixologist. The star here is yuzu, an Asian cousin of lemon with a more floral, herbal flavor.
Yuzu juice is more opaque than lemon, and mixing it with crème de violette would turn the drink a greenish-gray – so Traynor instead adds the violette at the end, allowing it to sink to the bottom of the drink for a beautiful skyline effect. This also has the effect of making the drink sweeter as you sip it, which is a nice change of pace from a standard Aviation.