At the end of 1994, Zhu Ling, a third-year chemistry student in Tsinghua University, developed strange poisoning symptoms: alopecia, facial paralysis, slurred speech and weakness of limbs. She was sent to Peking Union Medical College Hospital. The hospital is helpless and can't find out the reason. Her classmates translated her situation into English and sent it online for help. They received more than 2000 replies from all over the world, many of whom thought that she was poisoned by thallium, which was later confirmed by experts. But the diagnosis did not immediately improve her condition: this beautiful and clever girl in the past almost became a vegetable. Although the thallium intake was enough to kill people, the girl survived tenaciously.

Jasmine Sun is Zhu Ling's classmate, roommate and friend, and Zhu Ling belongs to the school band. Zhu Ling is the only person identified as a suspect by the Public Security Bureau in this poisoning case. The reason is that she was the only one who had access to thallium, lived in the same dormitory as Zhu Ling, and had time to commit crimes. Her motive for committing the crime is that she may be jealous that Zhu Ling plays the guqin so well that she has no chance to play the leading role in the Tsinghua Folk Orchestra. At the beginning of 2006, with the growing public opinion, the only suspect in this case, Sun Wei (formerly known as Jasmine Sun), was renamed as Jasmine Sun, and the original date of birth was changed to1August 1973 12. And used the identity photos taken in middle school to apply for new identity documents. On May 7th, 1995, the Beijing Public Security Bureau began to formally investigate the thallium poisoning case in Zhu Ling. Jasmine Sun, Zhu Ling's classmate in the dormitory, was listed as a poisoning suspect by the police.

On August 26th, 1998, the public security organ announced that Jasmine Sun was dismissed from the criminal suspect. Lawyer Chea Chang explained, "Dismantling a criminal suspect means that the public security organ removes the compulsory measures against the criminal suspect according to law because there is no conclusive evidence beyond the statutory time limit, but this does not mean that the criminal suspect is excluded.".

Later, netizens found information about Jasmine Sun's work in Nokia from 2002 to 2003. After marrying an American, Jasmine Sun went abroad and got a green card.

On May 3rd, 20 13, World Press Freedom Day, Sina Weibo set all the keywords about Zhu Lingan as sensitive words, causing uncontrollable anger and dissatisfaction among countless netizens. So someone in Weibo initiated a proposal to investigate Jasmine Sun to White House official website, and attached a link. A petition appeared on the official petition page of the White House, calling for the investigation and expulsion of Zhu Lingan suspect Jasmine Sun.

The petition reads: Jasmine Sun has motive and access to thallium, which paralyzes Zhu Ling. Later, I changed my name and went to the United States through "cheating marriage". The petition said, "In order to protect our safety, we ask the government to investigate and expel her". The threshold for the White House to respond to petitions is to get 6,543.8+million signatures within 30 days (June 3), and there are already 654.38+ 037.647 petitions, and some signers' information shows Chinese characters. In April of 20 13, Jasmine Sun, a former dormitory classmate of Zhu Ling, posted a net post on Tianya Forum, saying, "I want to bring the real murderer to justice more than anyone else." .