Sentencing Anxiang Du, who stood in the dock staring down at his hands, Mr Justice Flaux told him the jury had rejected his defence of diminished responsibility or loss of control.
What is clear from the evidence and the verdicts is that these were cold-blooded murders which, in my view, were pre-meditated and were considered acts of revenge in which you wiped out an entire family.
Barristers for Du had argued he should be convicted of manslaughter on the basis of diminished responsibility or loss of control as he was suffering a severe depressive illness at the time of the killings but jurors dismissed the claims.
I'm quite satisfied that hatred and anger and your desire for revenge was what motivated you to act as you did on the 29th of April, not the moderate depression you suffered.
Anxiang Du has been found guilty of killing a family of four in a revenge attack after he lost a legal case against the parents in 2011.
Relatives of the Dings who were stabbed to death have said it was "like the whole sky had fallen down" when they heard about the murders.