Who killed Xu Wei in the script?

Many years ago, Tang sent a letter to an academician looking for gene drugs for cell regeneration, so he was targeted and killed by criminal organizations. Some scientific research materials were also taken away by criminal organizations, so the case was not solved and became an unsolved case. Academician Tang's family entrusted Lin Yanming, director of the detective agency, to find the murderer and gave the remaining scientific research materials to the detective agency for safekeeping. In the process of pursuing this case, the detective agency was also targeted by criminal organizations. Because criminal organizations only get some information, they can't make further breakthroughs in research, and the detective badge in Lin Yanming's hand can consult case records and scientific research materials.

In order to get the badge and read the rest of the scientific research materials, criminal organizations kidnapped Lin Yanming and his companions when he led a team to attend a detective party. Because Lin Yanming didn't leave his badge on his body, the criminal organization failed to get what he wanted. The team members have become experimental products of criminal organizations, injected with failed genetic drugs, and have no contact with each other.

After Lin Yanming disappeared, his grandson Lin Zhi, who lived alone with him, changed his name to the South and was sent to the starlight orphanage. In the orphanage, Linzhi met a group of partners, Shen Xinglan, Li Yue, He Zhi, Yunyun, Yuan Ting and Xiaoman. They depend on each other, warm each other and become family members who accompany each other.