After smoking three cigarettes in one go, Xing'er's husband went outside and brought Xing'er's head into the house, and without stopping, he placed her head on top of the large hole he had previously smashed, fitting it perfectly but leaving half of her face exposed. He bricked around her head and then coated it thickly with cement.
After some tidying up, the wall displayed something akin to a mask. Although it looked somewhat eerie, overall, it was quite artistic.
The next day, when the cement and such had mostly dried, he painted the wall again, making it indistinguishable from before as if the mask-like face had always been there from the beginning.