1. Learn basic strokes: The basic strokes of brush calligraphy include horizontal, vertical, left-off, left-off and dot. Beginners can learn how to write these basic strokes by imitating calligraphers' works or using copybooks.

2. Master the basic structure: The font structure of brush calligraphy is very important, and beginners need to know the basic structure and proportional relationship of each word. You can learn the rules of glyph structure by observing calligraphers' works or using copybooks.

3. Cultivate correct posture and pen holding method: Brush calligraphy requires certain physical coordination and hand flexibility, and beginners need to cultivate correct posture and pen holding method. You can consult a teacher or take a calligraphy class to learn the correct posture and pen holding method.

4. Practice more: Brush calligraphy needs constant practice to improve. Beginners can choose simple words or phrases to practice, and the difficulty will gradually increase. You can practice on paper with a brush and ink, or you can practice with copybooks.

5. Pay attention to the strength and speed of the pen: the strength and speed of the brush calligraphy are very important for the performance of the font, and beginners need to pay attention to controlling the strength and speed of the pen. You can gradually adjust the intensity and speed in practice to achieve the desired effect.

In a word, junior high school students need perseverance and patience to practice Chinese calligraphy. Through continuous study and practice, they can improve their calligraphy level.