Osmanthus Wine is, pretty self explanatorily, a type of wine made out of osmanthus, a plant that grows on the form of shrubs or small trees (mainly on Asia).
Commonly used as a joke between Genshin Impact players, as it is part of a voiceline repetitively said by the character Zhongli;
“Osmanthus wine tastes the same as I remember, but where are those who share the memory?”
Nobody knows what the memory is, now who are “those who share it”.
Person A: “I finally drank Osmanthus Wine after so long.”
Person B: “Does it taste the same as you remembered?”
Person A: “Yes, but where are those who share the memory?”
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.