One of them refers to the full selection system of Japanese Volks company (commonly known as the old V, V society) that does SD.
It is to make a spherical joint humanoid (BJD) that is closest to one's ideal according to one's own preferences, eye color, hairstyle, face shape, body state, hand and foot posture, etc.
/fcs/
I only have English station here, which is relatively newer than Chinese station. The photo is too old to be viewed according to the present aesthetics.