行书 (Xíngshū), or "running script," is a style of Chinese calligraphy that combines elements of both regular script and cursive script. It is characterized by its fluid and dynamic strokes, allowing for faster writing while maintaining legibility. Xíngshū is often used for personal letters, poetry, and artistic expressions. This script emerged during the Han Dynasty and became popular among scholars and artists. It is appreciated for its aesthetic appeal and expressive qualities, making it a favored choice for calligraphers. Notable calligraphers, such as Wang Xizhi, have significantly influenced the development of Xíngshū.