The running script is flowing, and the strokes echo with thin lines, which are called "hairspring", "hairspring", "faucet" and "faucet".
Binding thread is also called hairspring, traction belt and traction belt. A calligraphy term, which refers to the slender strokes left between successive strokes due to the gesture when writing stippling. As slender as hair, it is quite healthy and neat, which plays a role of calling and responding and can show the skill of calligraphers.