Man in his 50s stabs his former girlfriend to death in Chongqing, China = Chinese report

On the 18th in Chongqing, China, a man in his 50s stabbed a woman in her 50s, who was his former partner, with a knife and fled. According to the Chongqing Municipal Public Security Bureau Shapinghuang District Branch, around 9 a.m. (local time) on the 18th,
The suspect, Mr. Tian (male, 53), stabbed his former partner Mr. Zhang (female, 50) with a knife near his home in the same ward due to emotional tangles and fled.
Police started an investigation after receiving the report. On the same night, a certain suspect was taken into custody.
Mr. Zhang was taken to a hospital, where he was later confirmed dead. Additionally, after Ta-san escaped, a fire of unknown cause broke out at his home. The fire department extinguished the fire.
The fire was quickly extinguished. No human casualties were confirmed due to the fire. Police have detained a certain person in criminal custody and are conducting an investigation.