Ji's microblogs have been forwarded on several popular Internet websites and forums. A microblogger coded "Tianjindewuliao" said "people are overlooking on corrupt officials everywhere."
Chinese netizens' morale in hunting down corrupt officials via the Internet has been boosted.
Web condemnation from the public led to the removal of safety official, Yang Dacai, from the northwestern Shaanxi province, in September, and urban management official, Cai bin, in southern Guangdong Province, in October.
The former was caught wearing different luxury watches in pictures posted on the Internet, while the latter was exposed to own 22 homes, far outpacing his salary.
Ji said the video and the details of Lei's scandal and corruption evidence was first exposed by a man called Zhu Ruifeng on media.people.com.cn.
Ji then investigated and called Lei to see his response, before forwarding Zhu's materials on his own microblog.
Ji added he had handed all the video material and other evidence on Lei's problem to Chongqing discipline investigators.
Previous probes into officials involved in sex scandals has often led to evidence of corruption. A tobacco official in Guangxi Zhuang Autonomous Region, Han Feng, was found guilty of corruption in 2010 after his diary detailing sexually explicit tales was posted online allegedly by one of his mistresses.
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