Mao Ni
At the start of the chapter, it said "Her feet were in the light, but her body was in the dark". I remember the headmaster said the same thing about sangsang body (before and come back on earth): her body is dark but her feets are white. Does the headmaster or Haotian knew they were going to enter the chessboard or does something that apply to the old sangsang still apply to the current sangsang ?