The Centre for Health Protection has learned of an avian influenza A(H7N9) case in Guangdong.
The patient is a 63-year-old man living in Meizhou.
Mainland health authorities have reported 759 human H7N9 cases since 2013.
The centre reminded people not to visit live poultry markets and farms and to avoid contact with poultry, birds and their droppings.