Why did calligraphy flourish in the Jin Dynasty after the Han Dynasty?

During the Han and Wei Dynasties, the popular official script began to decline, and regular script, as a new font, was on the way to replace official script, especially after Zhong You created it. When Cao Zhang, which developed from simplified Chinese characters, became increasingly prosperous, today's grass, inspired by the rise and development of regular script, has revealed the clue to replace Cao Zhang; Running script is also accumulated and nurtured under the attack of regular script and cursive script. They all prepared the internal conditions for China's calligraphy art to shine in the Jin Dynasty. During the Wei and Jin Dynasties, paper was widely used, which provided convenient conditions for calligraphy practice and dissemination. In addition, the plump and soft pen, ink with touch pigment color and excellent inkstone are also favorable conditions for promoting the development of calligraphy, which provides a guarantee for calligraphy tools. During the Han, Wei and Jin Dynasties, the widespread popularity of the ideas of metaphysics, Taoism and Buddhism provided a diverse cultural background for the creation of calligraphy art. The rise of metaphysics in Wei and Jin Dynasties advocated free talk and style of writing, which directly influenced the ideological interest of literati at that time. In calligraphy, he began to boldly pursue the artistic style of transcendence and chic, laying a psychological foundation for the freedom of running script, the richness and chic of cursive script, the changeable hands and the carefree river. During this period, the prevalence of carving holes, carving stone scriptures and building temples and monuments objectively promoted the popularization and development of calligraphy. During Wei and Jin Dynasties, calligraphy theory was also very popular. During this period, the main body of calligrapher's calligraphy art emerged one after another, and China's calligraphy finally became an independent art in the Jin Dynasty after generations of artistic inheritance and innovation accumulation.