Because the front collar collar of the open collar is below BP point, in order to achieve the effect of open collar type, the front middle can be set 0.5 to 1.2 cm style. Style skimming is based on the height of barge points to set the size of the volume. It can be set at 0.5 cm above the BP point. It can be set at 0.7 cm to 0.8 cm at 3~5 cm below the BP point, and 1 to 1.2 centimeters can be set at 3 cm below the waist line. Style skimming will not affect the conversion angle and shoulder angle of the chest line, nor will it affect the transfer angle of the chest line.