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 crme 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.