A Guangdong city party boss has been jailed for four years for dereliction of duty that led to huge economic losses and social instability, an official paper said. Li Guanghui, former party secretary of Enping, Guangdong province, was sentenced by the Jiangmen Intermediate Court on Wednesday, the Nanfang Daily reported. The report said Li, through his financial company, had manipulated interest rates. The former party boss had caused 'financial chaos in Enping'.