Xingyun

Xingyun is the slash ship between Xingqiu and Chongyun from the Genshin Impact fandom.

Canon
In Chongyun's voiceover lines, he states that he admires Xingqiu for his devotion to chivalry and passion for reading, but has also seen the latter's mean side. He is a common victim of Xingqiu's pranks and antics.

In Chongyun's story, it's stated that Xingqiu gave him the idea that, instead of attempting to reduce the effectiveness of his congenital positivity, he should search for an evil spirit that is immune to it. Xingqiu often gives him fake intel of sightings of evil spirits, and they come home empty-handed. Chongyun has no idea and blames it on his bad luck. Surprisingly, Xingqiu will try to lift his spirits after his pranks, doing things like getting him cold food.

In Xingqiu's voiceover lines, he states that he and Chongyun understand each other very well, implying they have been friends for a while. He also states that whenever you see Xiangling out and about searching for ingredients, she'll try to get you to try her newest recipe. He says that he'll usually get Chongyun to try it out.

In Xingqiu's story, it's stated that Chongyun is the one who usually bears the brunt of his bizarre humor. Just like in Chongyun's story, it talks about how he often pranks the latter by giving him fake intel, setting up traps in areas Chongyun practices in, etc.

In Xiangling's voiceover lines, she states that she always sees Xingqiu and Chongyun eating together at Wanmin Restaurant.

Fanon
The ship mainly sailed due to the popularity of the "Best Friends to Lovers" trope, and their dynamic. Many users enjoy their elemental chemistry; as Xingqiu is a Hydro user and Chongyun is a Cryo user, both use elements that work very well with each other and are able to apply the "Frozen" debuff on enemies when working together.

Both characters are shown to have romantic interest in one-another, and therefore fans are waiting for the confession sequence.

Fandom
FAN FICTION

Trivia

 * Xingqiu calls Chongyun "my dear".
 * Chongyun tries to form a "Victims of Xingqiu" alliance with the Traveler.