"Gu To" . . "虞" . . "グ トウ" . "To" . "Tang" . "Gu" . "トウ" . "Gu Tō" . "唐" . . "Yu Tang" . . "Yu" . "唐虞" . "虞 唐"@en . "Tō" . "グ" . "唐虞" . . .