Pei Songzhi
Pei Songzhi, who annotated Yu Jin's biography in the "Sanguozhi", commented that even though Yu Jin followed the book when he executed Chang Xi (who surrendered after being surrounded), he had another option – send Chang Xi as a prisoner-of-war to Cao Cao and let his lord decide Chang Xi's fate – that was still not considered a violation of the norms. Pei Songzhi felt that Yu Jin deserved his eventual fate – ending up as a prisoner-of-war and receiving a negative-sounding posthumous title ("severe marquis") after death – because he was unwilling to make an exception for an old friend, was inclined towards killing, and was harsh in suppressing dissent.