Pencil H refers to hardness, and B refers to softness, that is, the amount of graphite in it. Generally 1~2 pencils are enough for HB. 2B~6B are suitable for beginners to learn still life. Beginners usually use 2B and 3B to draw still life pictures. Because the color is too dark, it may be more troublesome to modify. The final version can be 3B and 4B. You can use 4B to draw light and shade first, and then use 5B and 6B to gradually deepen. The depth of sketch color is not the thickness of pen. It is the effect that lines are constantly superimposed together. So when using a pen, don't use special force because you need to deepen the color. This is a misunderstanding when many people start to learn. There should be some contrast in the picture, and the glass products must be coated with hard lead to express the texture. Other teachers will teach you to draw slowly. In addition, the eraser of sketch is very important. The market is more 2, 3 yuan. It won't take long for this rubber to get sticky, which is very troublesome. Huibaijia is highly recommended, around 5 yuan online. It is not easy to buy in general stores. You can ask the teacher.