The leadership of Shanxi province on Saturday backed the nationwide anti-corruption campaign hours after it was revealed that two senior officials were being investigated.
The province's top leaders convened after the announcement by the Central Commission for Discipline Inspection of the Communist Party of China.
They promised to pursue the anti-graft campaign initiated by President Xi Jinping and vowed to avoid being drawn into corruption.
They said they would ensure their families and associates did not become involved either, according to Sunday's edition of the official Shanxi Daily.
Saturday's announcement brings the number of the province's 13 top Party leaders under investigation to four.
On Sunday, the Taiyuan public security bureau announced that Liu Suiji, Taiyuan's police chief, had been removed from his post.
He was succeeded by Wang Fan, deputy director general of the security administration bureau at the Ministry of Public Security.
Zhu Lijia, a professor of clear governance at the Chinese Academy of Governance, believes the corruption problem in Shanxi is more serious than in other provinces because of its resource-based economy.Â