A former senior traffic police officer in Zhanjiang, Guangdong province, is being investigated for serious disciplinary violations, while 39 officers from the city's vehicle administration office are being probed for allegedly taking as much as 21 million yuan ($3.37 million) from driving test takers.

Liang Zhixiong was removed from his post as director of the Zhanjiang Vehicle Administration Office and put under shuanggui early this year, according to the city's Party anti-graft body.

Shuanggui is a procedure in which Party and government officials are asked to confess to wrongdoings at a stipulated time and place, for serious violations of Party discipline and State laws.