Among the ink marks on European books, only Zhongni Meng's memorial calligraphy should be authentic. Whether the Thousand-Character Inscription is authentic is really not certain. Some people think it is authentic based on the comparison of the pen and ink used with other ink marks. , but there are also doubts. I think whether it is true or not, it has high research value for the study of Ouyang Xun's regular script and running script.