From the description:

"Li said the incident took place at 20:00 on the the 5th and more, he had just come out of a fast food restaurant in Baogang Avenue, a 31-year-old woman alone in the street screaming, her hand waving a pair of scissors.

Another witness said Miss Lee, the woman suspected of having some mental illness, said aloud that the world was ending, and people should stab themselves with scissors."