A fourth former official from China's top securities regulatory body has reportedly gone missing amid a heightened crackdown on stock market corruption. This follows recent developments, including the sentencing of a former official to life imprisonment for accepting bribes. Investigations are also ongoing into a former member of China's ChiNext IPO Review Panel. The anti-graft watchdog has confirmed that a senior official at the securities regulator is under investigation. These events are part of a broader effort by Chinese authorities to address corruption within the financial sector, which has seen multiple officials implicated in various scandals.