What are the artistic features of Prajna Paramita in calligraphy?

The Prajna Sutra has been sealed for seven years in Dali, with 24 characters and a size of more than one foot. This stone was carved in Wushan, Fuzhou before, but now the original carving has been destroyed. Monuments to the world and the land call this moment "four wonders" with Chuzhou New Post, Jingshui Forgetting to Return to Taiwan and Jinyun County Chenghuang Temple.