Highlighting suspicion of the government by Chinese society, hundreds of people have made online "anti-suicide" pledges to mock the police ruling that the woman killed herself.
"Hereby I say I won't commit suicide under any circumstances, for the Communist Party, for the country or for the people," said one using the name PY-Liu in a posting on a microblog.
"If I commit suicide, then it's definitely fake."
The government keeps a tight grip on the Internet, censoring content it deems politically sensitive or pornographic, but experts say the number and speed of microblog postings makes them more difficult to control.
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But police say she jumped from the building and their initial investigations ruled out sexual assault and murder. Authorities have arrested a woman for "spreading rumours" about the case, state media have reported.
Another microblog user, yesir1, urged more to support the cause: "One wave after another! Microblogs are full of anti-suicide pledges. There has never been such a strange state of affairs in 5,000 years (of Chinese history)."