1. Correct posture: Keep your body relaxed, your feet flat and your arms droop naturally. Hold the pen moderately with both hands, neither too tight nor too loose.

2. Steady pen: When writing, keep your wrist steady and don't shake. When using a brush, you should use the strength of your whole arm to control the thickness and strength of the strokes.

3. The shade of ink should be moderate: the concentration of ink should be moderate, neither too thick nor too thin. Too much ink will blur the handwriting, and too little ink will blur the handwriting.

4. Choose a good paper: choose a paper suitable for writing with a brush, such as Xuan paper or rough paper. These papers have good ink absorption and can better reflect the characteristics of writing brushes.

5. Practice basic strokes: The basic strokes of brush calligraphy are horizontal, vertical, skimming, pressing and dot. Beginners can improve the accuracy and fluency of strokes by practicing these basic strokes repeatedly.

6. Pay attention to the glyph structure: each Chinese character has its own unique structure and proportional relationship. Pay attention to the structure of glyphs when writing, so as to maintain the overall balance and aesthetic feeling.

7. Observe more model characters: observe excellent brush calligraphy works and learn font characteristics and skills. You can improve your writing level by imitating model essays.

8. Keep practicing: Brush calligraphy needs long-term practice and accumulation. Beginners should keep practicing for a period of time every day and constantly improve their skills and level.

In short, junior high school students should pay attention to posture, pen and ink, and paper skills when practicing Chinese calligraphy. At the same time, we should pay attention to the practice of basic strokes and font structure, observe more model words, keep practicing and constantly improve our writing level.