Yuezheng Longya (ไนๆญฃ้พ็) is a part of the 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 Yayin (็้ณ), an originalVocaloid character illustrated by ayaya. His design was a top rank choice during the "Vocaloid China Project".