我们今天意义上的行书,其面貌介于楷书和今草之间,而在行书萌芽和未成熟阶段,却是另一番面貌。正如裘锡圭先生所说:“我们所熟悉的行书是介于楷书跟今草之间的一种字体。在刘德升等人的时代,今草还不存在,他们所写的行书当然不会跟我们所熟悉的行书完全一样。可惜刘、胡二家的书迹现在都已经看不到了。” The meaning of today’s missionary book, its appearance between the regular script and today’s grass, but in the germination and immature stages of the practice, it is another look. As Mr. Qiu Xigui said: "The book we are familiar with is a typeface between the regular script and today’s grass. In the era of Liu De-sheng and others, the present grass does not exist yet and the written works of course do not tell us The familiar line is exactly the same, but it is a pity that both Liu and Hu Er’s books can no longer be seen now.