For example, a white, red and green corner block, turn this corner block to the edge between the red and green central blocks, and then look at the white position. The formula 1 is used for the right side: right cis (r), up cis (u), right inverse (R'), white front, and forward inverse (F'), up inverse (U') and forward cis (f) with formula 2.
If the white corner is above or below, but the position is wrong, put the white corner on the right hand side and adjust it in the formula 1. After the spelling, it should be the bottom surface, including the surrounding colors of the bottom layer, which are completely restored.
Signal main mark
It consists of "code number of each layer" and "rotation direction".
Code of each layer: Each layer of the Rubik's Cube is referred to by the English initials. R (right), L (left), U (upper), D (lower), F (front) and B (rear) refer to right, left, top (upper), bottom (lower), front (front) and rear (rear) layers respectively.
Rotation direction: rotate 90 clockwise to directly write the codes of each layer; Rotate 90 counterclockwise, and each layer codes suffix' or I'; Rotation 180, with each layer coded with suffix 2 or 2' (default clockwise rotation180); If you rotate two layers, use lowercase layer code or add w after the code.