What is a willow charcoal stick? Is it better to draw with charcoal pen, carbon stick or carbon bar when sketching?

Willow carbon strips are carbon strips made of good willow. They are light in weight and have the nature of pencils, but they are different in thickness. Compared with charcoal pen, it is not easy to get dirty and the price is cheaper. I bought it when I was sketching in Chinese painting class. Made in Beijing,

Sketch to see which one you are used to. The effect of each one is different, which is related to your proficiency. I suggest you try them all to see which one is easier to master. Once selected, it is best to use one for a long time to prepare for the exam.