而钢笔和粉笔技法则理论薄弱，在用笔技法上的阐述难得一见，因此很有释疑解难的必要。
Since the theory of pen and chalk calligraphy is poor, it is essential to interpret the technique of pen and chalk calligraphy.
中国画的技法是以“骨法用笔”作为支撑，艺术的基本表现手段是线。
The technique of Chinese painting is supported with the painting of its frame and its artistic expression is showed in lines.
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