Unlike the square shaped seal script, the kanin in the Sui and Tang Dynasties had distinctively decorated and elegantly winding script, which was rearranged from the curve of the small seal script.
隋・唐の官印の文字は、角ばった印篆から一転し、小篆の曲線を優美にうねるような曲線に変えた独特の装飾書体が用いられた。