What's the difference between hard pen calligraphy and brush calligraphy?

Hard pen calligraphy and brush calligraphy are both China's calligraphy, and the difference between them lies in the rules of brushwork and font structure. The rules of brush calligraphy are more complicated and changeable, and more attention is paid to the interest, cultivation and artistic conception of pen and ink. Relatively speaking, the brushwork and writing rules of hard pen calligraphy are relatively simple and easy to master. Therefore, hard pen calligraphy is more grounded and easier to popularize; However, brush calligraphy has limitations, and not everyone wants to be a calligrapher.