Chinese billionaire Bao Fan has resigned from his top position, according to his bank. Bao is the founder of Hong Kong-based investment bank China Renaissance.

The resignation is "for health reasons" and Bao wants to focus more on his "family matters" Bao was reported missing by the bank in mid-February last year, and the company said it was "cooperating" with authorities in mainland China. No information on Bao's current situation or the content of the investigation against him.