What are the characteristics of rhythm in calligraphy?

The rhythm of calligraphy mainly refers to the changes of strokes and lines, such as movement, ups and downs, dryness and so on. This rhythm comes from the vivid charm of the lines in calligraphy works as a whole, such as the neutralization of Wang Xizhi's cursive lines and the lightness of Dong Qichang's cursive lines, which constitute different types of rhythm in calligraphy art.