The author combined many historical cases of forensic science with his own experiences and wrote the book with an eye to avoiding injustice.

The third, fourth, and fifth volumes detail the appearances of corpses from various causes of death and methods of treatment to certain injuries of a wounded person.

[3] Topics that Song Ci commented on in the book include the regulations for preparing autopsy reports for the courts, how to protect the evidence in the examining process, and the reasons why workers should show impartiality during examinations;[4] he also provided descriptions on how to wash dead bodies to determine different causes of death.

A wrongful death sentence without justice may claim one or more additional lives, which would in turn result in feuds and revenges, prolonging the tragedy.

In The Washing Away of Wrongs (an alternative translated title of the same book), the first documented forensic entomology case is reported.

Once assembled, the magistrate ordered the ten-or-so suspects to place their hand sickles on the ground in front of them and then step back a few yards.

The knowledge of the village magistrate as to a specific insect group's behavior regarding their attraction to dead human tissue was the key to solving this violent act and justice was served in ancient China.