Su, former vice chairman of the China's top political advisory body, is now spending the rest of his life behind bars for graft.
He was also held accountable for serious corruption in Jiangxi Province, where he was Party chief between 2007 and 2013, according to the Communist Party of China (CPC) Central Commission for Discipline Inspection (CCDI).
After an inspection team sent to Jiangxi pointed out the delay in handling follow-up issues of Su's case in last October, the provincial CPC committee launched a series of campaigns to educate Party members.
A total of 43 prefecture-level officials involved in Su's case have been investigated so far.
The moves are examples from the changes brought by the 10th round of inspection initiated by the central authority in last July.
Inspections covered 32 central agencies and provincial regions. Inspection teams were also deployed to four provincial regions that have been inspected in previous rounds, including Jiangxi.
Following the inspections, a number of changes have been made.
The Party group of the National Audit Office set up a tracing system to supervise the progress of corrections in response to inspectors' instruction.
The Party group of Chinese People's Political Consultative Conference National Committee has started dissolving affiliated companies.
The Party committee of the Ministry of Public Security pushed forward regulations and mechanisms to strengthen reforms in selecting officials.