Quadruple murderer Anxiang Du will spend the next four decades behind bars after he was sentenced at Northampton Crown Court.
Du, aged 54, was sentenced to life with a minimum term of 40 years.
He was sentenced by High Court Judge Mr Justice Flaux after yesterday being convicted of the murders of the Ding family at their home in Pioneer Close, Simpson Manor, on April 29, 2011.
Passing sentence, the judge said Du had “killed an entire family in cold blood”, during a frenzied attack of “savage butchery”.
Discussing the murder of Mr Ding, he said: “Jeff Ding was minding his own business at his own home on a sunny bank holiday weekend when you launched a frenzied attack on him with a knife, stabbing him 23 times.
“During the struggle, he tried to defend himself, suffering stab wounds to his arms and hands.”
On the murder of Mr Ding’s wife, Helen,the judge told Du: “The truth is you killed her for the same reason you attacked Jeff Ding. It was a pre-planned attack of revenge.
“She evidently did not have time to defend herself.”
After murdering the two parents, Du went upstairs where he killed their daughters, Xing, aged 18, and Alice, aged 12.
The judge described Xing’s 999 call for help as “haunting” and said Alice had no way to defend herself.
He said: “Alice, who was only 12, was on her bed, curled up, no doubt in a futile attempt to get away from you. There was no struggle.”
Summing up, he said Du put a “significant degree of planning” into the murders and carried them out with “ruthless efficiency”.
Du showed no emotion as he was taken away from the dock.
The jury or eight women and four men took just over three hours to find Du guilty of four counts of murder yesterday