When writing a calligraphy, it is important to concentrate on it. Whenever you write a word, it must be connected up and down, echoed left and right, and folded into one piece. Therefore, the momentum must come from the proficiency of using the pen. If the pen is stagnant, the expression is dull, and the restraint is not smooth, then there will be no power at all, let alone the ability to breathe, so the art of calligraphy will be powerful...