BEIJING, Nov. 28  -- A top political advisor in south China's Guangdong Province is under investigation for suspected "serious discipline and law violations," official sources said Friday.

Zhu Mingguo, 57, is chairman of the Guangdong Provincial Committee of the Chinese People's Political Consultative Conference, according to a statement from the Central Commission for Discipline Inspection of the Communist Party of China.

Zhu had served as vice governor of Hainan and secretary of the Communist Party of China's Hainan provincial committee for political and legal affairs from 1998 to 2001.

He became head of the public security bureau of southwest China's Chongqing Municipality in 2001 at the same time as holding the post of secretary of CPC's Chongqing municipal committee for political and legal affairs between 2002-2006.

From 2006, he served as head of the provincial discipline inspection agency of the CPC in Guangdong, deputy secretary of the Guangdong Provincial Committee of the CPC, and secretary of CPC's Guangdong provincial committee for political and legal affairs.

Zhu became Guangdong's top political advisor in January 2013.

A native of Wuzhishan in south China's island province of Hainan, Zhu joined the CPC in 1975.