Subsequent tests confirmed that Zhu did indeed have high levels of thallium in her body.

. 3 Zhu Ling . Not long ago, [the news on] Fudan University graduate student Huang Yang being poisoned to death by a classmate shocked many people, the incident reminding people of the 1995 Tsinghua University female student Zhu Ling’s thallium poisoning case. Unlike the Fudan poisoning … The petition said that the victim Zhu Ling was permanently paralyzed due to thallium poisoning. The 19-year-old woman student was poisoned … Zhu Ling (Wade–Giles: Chu Ling) is the name of the following Chinese people: . They wound up receiving thousands of responses, many from people who believed that Zhu had been poisoned by a toxic heavy metal known as thallium. In 1994, Zhu Ling was a sophomore in Class Wuhua2 (Physical Chemistry) at Tsinghua University in Beijing.
Zhu Ling was poisoned with thallium in 1994 but no one has been charged or prosecuted over the act. From NetEase:.
From NetEase: 30,000 People Signed Petition Requesting White House Intervention on Zhu Ling’s Case Not long ago, [the news on] Fudan University graduate student Huang Yang being poisoned to death by a classmate shocked many people, the incident reminding people of the 1995 Tsinghua University female student Zhu Ling’s thallium poisoning case. 30,000 People Signed Petition Requesting White House Intervention on Zhu Ling’s Case.

Many media reports drew parallels with the case and that of Zhu Ling, who was poisoned 18 years ago at Beijing's Tsinghua University. Story highlights Zhu Ling was studying at Tsinghua University in 1994 when she was poisoned In 1994, Zhu Ling was a sophomore studying physical chemistry at one of the nation’s most prestigious universities, Tsinghua University. Zhu Ling (Three Kingdoms) (朱靈; died 223), general of Cao Wei during the Three Kingdoms period Zhu Ling (economist) (朱玲; born 1951), Chinese economist Zhu Ling (volleyball) (朱玲; born 1957), Chinese volleyball player Zhu Ling (poisoning victim) (朱令; born 1973), victim of a thallium poisoning incident In 1994, Chinese university student Zhu Ling began experiencing stomach pain, hair loss and partial paralysis. Thallium poisoning case of Zhu Ling In 1995 Zhu Ling was the victim of an unsolved thallium poisoning in Beijing, China. Zhu Ling’s college roommate Jasmine Sun had both the motivation and the resources to obtain thallium, but due to intervention of judicial justice by the powerful relations of the suspect’s family, the case was ended with unsettled result. Doctors were able to save her life.