Chang Chi-chih was a famous calligrapher of the Southern Sung period whose works were much admired in the neighboring Chin dynasty. He studied the style of the Northern Sung master Mi Fu and added elements of the T'ang dynasty manners of Ou-yang Hsün and Yang Chen-ch'ing to create a style of his own. The characters in his calligraphy are strict and studied, his forte being brushwork. In this version of The Diamond Sutra, the characters are archaicly elegant as the strokes flow freely, as if the entire text was done in one sitting.
Although the script is standard, elements of running calligraphy are also found. This was once in the collection of Hsiang Tu-shou of the Ming dynasty and was prized by the Ch'ien-lung Emperor of the Ch'ing dynasty.