BEIJING, Jan. 15 -- China will carry on its anti-graft battle this year through reforming the supervision system and tightening punishment, according to a Party document released on Wednesday.

Chief officials of Party organs at all levels should be aware that failing to curb corruption is a serious breach of duty, said the communique issued after the third plenary session of the Communist Party of China (CPC) Central Commission for Discipline Inspection closed here.

They will be the first to be held responsible if corruption occurs in their field of responsibility, said the document.

It also announced that the CPC will streamline its discipline inspection system.

Currently, each local discipline inspection agency is under the dual leadership of the CPC committee at the same level and the inspection agency of its superior level.

However, the CPC plans to grant more power to superior discipline inspection agencies, the document said.

The Party will continue fighting undesirable work styles, such as formalism, bureaucracy, hedonism and extravagance, in line with the eight-point guidelines issued by the CPC leadership in December 2012.

Discipline inspection agencies will continue investigating and punishing officials violating Party rules and laws, especially those embezzling public money, taking bribes, selling or buying government positions, bending laws for personal ends, living a corrupted lifestyle and failing to fulfill their duties.

"We will step up our efforts to hunt down corrupt officials who flee abroad and retrieve their illegal income," the document further vowed. "They will never go unpunished."

The plenary session opened on Monday and heard an important speech from Chinese President Xi Jinping.