From Zhang Huai: Wang Xizhi of Shu Duan. Synonyms of penetration point are: penetrating the back of paper, iron drawing silver hook, etc. The antonyms are: a glimpse of the rainbow, a glimpse of the leopard in the tube, etc.
Book End is a work written by Zhang Huai to comment on calligraphers and calligraphy in the Tang Dynasty. Among Zhang Huai's numerous works of calligraphy theory, Shu Duan has the greatest influence on later generations.
It is divided into three volumes: upper, middle and lower. The first volume describes the characteristics and development of various calligraphy styles; The second volume lists the biographies of calligraphers in the past dynasties in three categories: "God, wonder and ability", and comments on the merits and demerits of calligraphy, which is of high historical value.
According to legend, Wang Xizhi wrote on the board, and when carving, he found that the handwriting penetrated into the board for three minutes. The original description of calligraphy is very pen-like, but now many metaphors are very profound.
In fact, the word "penetration" comes from Zhang Huaiguan's Duanwang Xizhi in the Tang Dynasty. The article he wrote praised how vigorous and powerful Wang Xizhi's words were. Maybe Zhang Huaiguan is a small fan of Wang Xizhi, a book sage. Thousands of years later, this idiom is still used by later generations, and it is still used to describe a person's calligraphy level, to describe the vigorous brushwork of calligraphy, and sometimes to describe a profound understanding of something or an article.
In fact, the reason why Wang Xizhi's calligraphy can stir up the whole country is not only because of his scholarly family and so-called talent, but most importantly, he has made unbearable efforts in places that others can't see, and this effort is not only a mechanical repetition over and over again, but also a change and reflection on calligraphy.