A vice-president of Shenzhen Intermediate People's Court, Pei Hongquan, and his ex-wife and court director Li Huiliu, were detained last month for allegedly accepting bribes and indulging in decadent lifestyles, the South China Morning Post reported, citing a source familiar with the situation. Three other senior judges have also been detained under shuanggui, a form of Communist Party disciplinary investigation, one as early as June 6. Court officials and judges held a secret meeting shortly after Pei's arrest, but were told to "keep lips tight and not name names when questioned," an insider told the newspaper. More than 20 judges have been questioned by the anti-graft investigators so far and many more face investigation in what is believed to be the city's biggest judicial corruption case. Seperately, Yu Zhifei, the man who brought Formula One car racing to China, is reportedly under investigation for involvement in the Shanghai pension fund scandal. Yu, general manager of Shanghai International Circuit Management and Development, was "assisting the investigation" into the case, the official Shanghai Securities News said Wednesday.