Look at the centers of the nine squares on each side of the Rubik's Cube first. That piece won't move. No matter how the Rubik's Cube turns, the side with the central color must be the whole side of the same color.

Then look at the corner. The four corners of each side of the Rubik's Cube have three colors, and the four squares crossing the central color have two colors, and the corresponding directions of these colors are also fixed. For example, the top, bottom and left sides of this square are blue, red and yellow respectively, so the three sides are blue, red and yellow respectively according to the angle. The colors of the six faces are the same, which is actually to put the color blocks of the Rubik's cube back in place.

Extended data:

Rubik's cube six stickers are usually composed of six colors: red, yellow, blue, green, white and orange. There will be differences in printing methods in different periods and places, but they are basically red on the front, orange on the back, yellow on the top, white on the bottom, Zuo Lan and right green.

Because of the symmetry of the Rubik's cube, we might as well specify blue as the top surface when pasting. There are five kinds of stickers opposite him, and the remaining four faces form a circle. The four colors of this ring are removed from the rotation, and the same situation has a 3*2 paste method. This is because, for this ring, we can also specify one of the four colors as the front side, the back side has three pasting methods, and the remaining two sides correspond to two pasting methods, so the Rubik's cube sticker has 5*3*2=30 pasting methods.