Liang Qing Shu Tong said: "Qi must come from familiarity. If there is qi, it will have its own potential. If the size is right, it will follow the pen and naturally become a piece. " Therefore, the motivation still comes from the skill of using a pen. If the pen is stagnant, stiff and stiff, it is impossible to talk about it, let alone smooth. Therefore, the art of calligraphy can only be effective if it is in power, and it can only be effective if it is effective and fascinating. The cursive writing is the writing spirit and temperament between ecstasy and handy. The brushwork is changeable, such as "floating like a cloud, dexterous like a dragon", "hitting waves and thundering" and "flying with a hundred swords". These common adjectives in calligraphy all use things to express feelings in unpredictable dynamics. Because the cursive script is not fixed, you can freely imagine and think about the sky.