Shares in China’s largest interior decorator company Gold Mantis fell by 3.3% after the company confirmed that its controlling shareholder, billionaire Zhu Xingliang, had been arrested for suspected involvement in corruption. Xingliang, who sat on the board but didn’t formally serve as chairman or CEO, was detained at his home in connection with an investigation into wrongdoing by Ji Jianye, the former mayor of the eastern Chinese city of Nanjing, according to media reports. Ji “contracted many projects” to Gold Mantis, according to one report. Ji was replaced as mayor in October.