Located in Guangyang Town, Fangcheng County, Nanyang City, Henan Province, the former state-owned Zhongnan Machinery Factory is a well-known \"big three line\" Arsenal. Today, the plant has successfully transformed and its synthetic diamond production ranks first in the world.
Fangcheng County is located in the northeast corner of Nanyang Basin, the eastern foot of Funiu Mountain, according to the northeast exit of Nanyang basin.
Fangcheng lies in the five natural boundaries of North subtropical zone and South warm temperate zone, Yangtze River Basin and Huaihe River basin, Nanyang Basin and Huang-Huai-hai Plain, Funiu Mountain Range and Tongbai Mountain Range, North China platform and Qinling geosyncline.
Zhongnan Factory was established in 1981, which is a military enterprise invested by the state and built in 5 years, and has made important contributions to China's national defense construction.