Variations of jiu zixing can be seen in the Kangxi Dictionary, Old Chinese printing forms, Korean Hanja, some printed documents in Taiwan, and MingLiU in Windows 98 and earlier versions; slight differences may occur between different jiu zixing standards.
The development of wooden movable type during the Song dynasty caused the Chinese characters to take on a more rectangular form following the wood texture.
[4] Comparing movable type and woodblock styles, it can be noticed that movable type characters – which are the basis of jiu zixing today – are different from the random and changing nature of handwritten regular script, and emphasize clear strokes and the beautiful, symmetric structure of characters.
The checklist is conducted under philological research, with care given of orthographical theory, current usage, and aesthetics in traditional orthographies.
The standard also includes other orthographical forms with daily usage which have a legitimate philological source, providing various options to adjust and adapt character orthography on a per-font basis.
[8][9] There are other open-source[10][11][12] and commercial[13][14] fonts providing support for Inherited Glyphs Standardisation Documents standard.
However, the system fonts have been maliciously reported as "incorrect" by opponents[23] and forcing vendors to change them to xin zixing in later versions.