First, let's talk about the bar. Every time we practice strokes, adults will pull our ears and ask us to be "horizontal and vertical". The horizontal line must be straight, not crooked. If you draw a wavy line, it is even more forbidden. And when you write horizontally, you should tilt slightly upward, but the tilt angle should not be too large. If it's too big, it won't cross, and it becomes a stroke that I don't know what it is, which is quite ugly in the whole Chinese character.
Let's talk about vertical. Hard pen calligraphy has two kinds of vertical, one is hanging needle vertical, the other is hanging vertical. Of course, there is also a short vertical, but because the short vertical is written in the same way as the hanging vertical, it is only shorter than the hanging vertical, and we ignore the difference between length and length. As the name implies, the lower end of the hanging needle rod is as sharp as a needle tip, while the lower end of the hanging needle rod is like dew. If you want to write a Chinese character well, you must first learn the strokes well. If the strokes are ugly, it is impossible to write beautiful Chinese characters.