The boyfriend of Nana who fell to her death is?

On May 20, 2012, Nana (a pseudonym), a Nanjing girl who is a first-class singer with dozens of unexplained injuries caused by a sharp instrument, was sent to Nanjing Dafang Hospital to be rescued by a middle-aged man, Li, who claimed to be her boyfriend. Just after the third day of admission, Nana fell from the window sill on the second floor of the ward, and died after resuscitation.