The official kiln style of porcelain vibrato pen

The brushwork of porcelain, especially the brushwork of the official kiln, does not shake the pen, because the fonts of porcelain brushwork are mainly seal script and regular script, and there are few other fonts. In addition, there is no calligrapher's brushwork of writing porcelain, so this shaky pen calligraphy is not applied to the brushwork of porcelain, and it is possible to paint or inscribe on the surface of porcelain. thank you