A man surnamed Zheng is suspected of murdering seven people, including a seven-year-old girl and a woman pregnant with twins, in a fit of revenge after a man had an affair with his wife.
After Zheng served a one-year prison sentence for theft, he discovered his former friend had an affair with his wife.
Despite discussing the issue, Zheng remained displeased. Early on Sunday morning, he went to Wang's house in Xuyi county, Jiangsu Province, to seek revenge.
It was reported that Zheng planned to stab Wang in the legs. However, as he was not home, police say he instead used a 20-centimetre blade to slay Wang's parents and 7-year-old daughter, who had been visiting for the weekend.
He killed a 46-year-old man named Li, his wife, his mother-in-law and his stepdaughter, who was pregnant with twins. Li was Wang's uncle, according to Yangzhou police.
Zheng is then believed to have driven to Yangzhou, where he handed himself over to police.
Leniency is usually shown to those who turn themselves in to police. However, it is likely that this will have little bearing considering the magnitude of Zheng's actions.