Let me elaborate on the following points:
1.？ Positioning: list the position, size, height and height ratio of objects. Note: first determine the main object, and then determine the position, size and height of other objects through the main object.
2.？ Three lines: three lines are: contour line, light-dark dividing line and projection line.
3.？ Color paving: first unify the light and dark sides of all objects, from left to right and from top to bottom. Then sprinkle black and white ash on the object, pay attention to the former strong and then weak, the upper strong and the lower weak, the main strong and the second weak. Then spread the background color, the background plays a foil role, pay attention to black, white and gray.
4.？ Wipe: first wipe the main object, heavy color object, dark part and object outline. After wiping, wipe the highlights and reflections with hard rubber.
5.？ Shaping: Is black, white and gray clear? Did the thread rub into the noodles? Are the priorities clear? This is a process of checking and modifying paintings.