(Guihai the twelfth lunar month 20), January 25, 1924, 28 countries established the World Organization for Animal Health (OIE).

World Organization for Animal Health (OIE) is an intergovernmental organization, it is an international agreement signed by 28 countries on January 25, 1924. December 1999, OIE member countries has reached 155. main functions
the World Organization for Animal Health (OIE), including the following three aspects:
- notice to governments worldwide the animal epidemic as well as the cause of the epidemic, and to inform the control of these diseases.
- International Studies in the monitoring and control of animal diseases worldwide.
- coordination of Member States in the regulations and standards of the trade of animals and animal products.