Guihong Zhang, PhD, Professor of  College of Veterinary Medicine, South China Agricultural University. Scientist of China Agriculture Research System (swine industry).  irector of Guangdong Provincial Key Laboratory of Zoonotic Disease Prevention and Control. Committee member of the Third National Animal Disease Control Specialists Commite, China Animal Disease Eradication Program evaluation expert, Member of Guangdong Swine Industry Association Specialists Commite, Specialist member of Guangdong Association of Animal Science and Veterinary Medicine Swine Disease Branch.