Ru'nan (Traditional Chinese: 汝南 縣; Simplified Chinese: 汝南 县) It is a county under the administration of the city-prefecture of Zhumadian, Henan province, People's Republic of China.

In ancient times it was called "half the world", since it was located in the center of the nine provinces Yu. During the Han Dynasty, he contributed the largest number of officers to the central government, and was the ancestral home of the immensely influential Yuan clan of Ru'nan.

Coordinates: 33 ° 00'25 "N 114 ° 21'45" E / 33.007068, 114.362412

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