Wei and Jin Dynasties emphasized faith and respect for ghosts and gods. Their works were full of charm, so-called admiration.
In the Tang Dynasty, etiquette and law were emphasized, the emperor and relatives were respected, and works were strictly regulated, so-called respecting the law.
Song Dynasty: Political and military decadence, literati expressed their feelings, and calligraphy reflected their own ideas, which is called advocating ideas.
In the Ming Dynasty, there was political stability, ideological emancipation, and the works were lyrical, so-called love.