Two police officers walked free and two others were jailed for torturing a man over a 17-hour period before his death in a detention house in Nanchang.

Wan Jianguo, a 43-year-old medical company salesman, died on Aug 8 last year after investigators from the Nanchang police bureau of Jiangxi province interrogated him about the deaths of six patients at a city hospital.

The Nanchang Intermediate People's Court of Jiangxi province on Wednesday sentenced the four officers, after Wan's wife Wu Peifen refused a 3-million yuan ($440,000) compensation offer because she wanted the men to be brought to justice.