What are the characteristics of Jin Nong's calligraphy after 50 years old?

After the age of 50, Jin Nong further strengthened his personal characteristics, cut off his hair to make a book, and made a font with wide horizontal drawing, thin vertical pen and long vertical font with a flat pen side, which was later called "lacquer book". Jin Nong's "lacquer book" is a unique calligraphy style formed by the combination of calligraphy, calligraphy and calligraphy. His "Lacquer Book", regardless of stippling, is mainly based on Fang Bi, pursuing the taste of knives and stones. When painting both ends horizontally, it starts from the tortoise horn and closes the pen vertically. It has a dense structure, flat length, often large and small, and often oblique, with thick black ink, which is strikingly similar to the silk book of Han bamboo slips unearthed in the Western Han Dynasty. For this reason, later generations all admire his superhuman understanding and unique creativity in art. Jin Nong was the first calligrapher in the Qing Dynasty who consciously picked up the monument of Fahan and attacked traditional calligraphy. At the same time, he is also a successful person who is familiar with ancient laws and has a unique way. The significance of Jinnong stele study is far-reaching. Works handed down from ancient times include Xianghe Jing Axis, Painting Buddhist Inscriptions, Monument Axis of Hualinshan Temple, Monument Axis of Lin Yiying and so on.