Brush and soft pen are two different kinds of pens.
Writing with a brush may require wrist strength and arm strength, and the posture of holding the pen is different. Soft pen, also called soft pen (not elbow pen), seems to be not made of steel, and its writing effect is the same as that of brush pen. It was very popular in the early Republic of China and is also sold now.
Hard pen can be practiced as a whole, which is relatively easier than writing brush. If you want to practice writing brush well, you have to practice it one by one. In modern times, hard pen calligraphy was born. Relatively speaking, we called it brush calligraphy in ancient times.
Strictly speaking, there is no so-called soft pen calligraphy, and the soul of calligraphy is interlinked, not hard pen or brush. With the interest of learning brush calligraphy, there are three specific steps to overcome the lack of wrist strength in the early stage: eye repair, hand repair and realm repair. Simply put, it is to read more famous stickers, copy more according to law, and innovate more.