markets@ * Yi Huiman has spent more than 30 years at ICBC * Faces the challenge of reviving China's bruised stock markets * China stocks have fallen by 27 pct since a year ago (Updates with more details, analyst quote) SHANGHAI/HONG KONG, Jan 26 (Reuters) - China has appointed banking veteran Yi Huiman to head the China Securities Regulatory Commission (CSRC), putting governance of the nation's stock markets in his hands at a time when investor confidence has been hit by a slowing economy and...