Scalable modular U disk / U

Present, the two parts with different color of phase difference, divided into Yin and Yang, with the line "S" apart, shows that these two parts are mutually independent and should not be confused. On the colour of the U disk into the black and white and dichromatic tai chi, but moral is different from traditional tai chi are independent of each other, is the moral of confusion; It does mean mutual confluence, indivisible.