Zhang Chou of the Ming Dynasty said, "Chen Zhongchun said that his books are very similar to Suo Jing's poems." Another cloud said, "The reply post is the strangest, just like Suo You 'an's Ode to a Teacher. Too much erosion is a pity and not common. But the brushwork is round and muddy as wine, which is beyond the reach of the ancients. "
An Qi commented on Moguan in Qing Dynasty: "According to legend, the plain is good, but this post is not right, and calligraphy still exists."
In the Qing Dynasty, Yang Shoujing said "Ping Fu Tie": "It was written by Tu Ying Jin Hao, and it was neither flattering nor rude, so it was high."
The special significance of "Ping An Tie" in the history of China calligraphy is that it is the first multi-line calligraphy ink. Although Li Si, Zhong You, Zhang Zhi and other ancient calligraphers are well-known figures, they have no reliable ink. Stone carving works, because of piracy, hand carving, weathering and erosion, are far from ink; Moreover, although there was a lot of ink before, the calligrapher did not sign it and could not verify it. Therefore, the significance of the reply post in the history of calligraphy is becoming more and more obvious.