Utilize the input text as a context reference, choose the right relationship between 'Man Group' and 'hedge fund' from the options.
Options: industry, stock exchange, currency, chief executive officer

SHANGHAI, Aug 31 (Reuters) - Chinese authorities have taken Li Yifei, chairwoman of British hedge fund manager Man Group (LSE: EMG.L - news ) Plc's China unit, into custody to help with a police probe into market volatility, Bloomberg reported on Monday, citing a person familiar with the matter.
industry