乐正龙牙
[b]Yuezheng Longya[/b] (乐正龙牙) is a part of the [[vsinger (vocaloid)|Vocaloid China]] project. He's described as a forthright person with a sister complex; his sister is [[Yuezheng Ling]]. His family owns a large music corporation, in which he hopes to become the president of.

He is formerly known as [b]Yayin[/b] (牙音), an [[original]] [[Vocaloid]] character illustrated by ayaya. His design was a top rank choice during the "Vocaloid China Project".

His voicebank was released on June 26th, 2017.
yuezheng longya