1. At about 18:40 on May 9, 2021, Xiao Lin, a 16-year-old student of Sichuan Chengdu 49th Middle School, fell from Zhixing Building. After 120 on-site diagnoses, the student had no vital signs.
 2. On the afternoon of May 10, 2021, Chengdu No. 49 Middle School released a response on its official microblog, saying that the school has set up a working group to fully cooperate with the investigation and do its best to deal with the aftermath.
 3. At 3:54 a.m. on May 11, 2021, the official microblog of Chenghua District Education Bureau of Chengdu released the Notification on the Fall and Death of the First Student of No. 49 Middle School in Chengdu, saying that criminal cases were excluded.
 4. On the evening of May 11, the official microblog of Chenghua District Branch of Chengdu Public Security Bureau released a police notice: after on-site inspection, visit and investigation, access monitoring, autopsy, etc., it was determined that Lin, a senior two student of No. 49 Middle School, died from a high fall, and the criminal case was ruled out.
 5. Family members have been informed that they have no objection to the investigation conclusion.