Youyu County, also known by its Chinese name Youyuxian, is a

county A county () is a geographic region of a country used for administrative or other purposesL. Brookes (ed.) '' Chambers Dictionary''. Edinburgh: Chambers Harrap Publishers Ltd, 2005. in some nations. The term is derived from the Old French denoti ...

under the administration of the

prefecture-level city A prefecture-level city () or prefectural city is an administrative division of the China, People's Republic of China (PRC), ranking below a province of China, province and above a Counties of the People's Republic of China, county in China's ...

Shuozhou Shuozhou is a prefecture-level city in northern Shanxi province, China, bordering Inner Mongolia to the northwest. It is situated along the upper reaches of the Fen River. The prefecture as a whole has an area of about and, 2010 PRC Census, ...

, in the northwest of

Shanxi Province Shanxi; formerly romanised as Shansi is a province in North China. Its capital and largest city of the province is Taiyuan, while its next most populated prefecture-level cities are Changzhi and Datong. Its one-character abbreviation is ( ...

, China. It borders

Inner Mongolia Inner Mongolia, officially the Inner Mongolia Autonomous Region, is an Autonomous regions of China, autonomous region of China. Its border includes two-thirds of the length of China's China–Mongolia border, border with the country of Mongolia. ...

to the north and west.

History

Shanwu,. south of present-day Youyuxian, was the seat of Yanmen Commandery during the Qin and

Western Han The Han dynasty was an imperial dynasty of China (202 BC9 AD, 25–220 AD) established by Liu Bang and ruled by the House of Liu. The dynasty was preceded by the short-lived Qin dynasty (221–206 BC) and a warring int ...

. The post moved to Yinguan southeast of present-day

under the

Eastern Han The Han dynasty was an Dynasties of China, imperial dynasty of China (202 BC9 AD, 25–220 AD) established by Liu Bang and ruled by the House of Liu. The dynasty was preceded by the short-lived Qin dynasty (221–206 BC ...

and further south to Daixian under the Kingdom of Wei.

Geography

Elevations are generally higher in the south of the county, in which flows the Cangtou River (); Youyu reaches a north-south extent of and east-west width of . The

Great Wall The Great Wall of China (, literally "ten thousand Li (unit), ''li'' long wall") is a series of fortifications in China. They were built across the historical northern borders of ancient Chinese states and Imperial China as protection agains ...

demarcates the northwestern border with

's Liangcheng and Horinger counties; within the province, Youyu borders Zuoyun County to the east, Shanyin County and Pinglu District to the south.

Climate

Youyu has a

monsoon A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in Atmosphere of Earth, atmospheric circulation and precipitation associated with annu ...

-influenced,

humid continental climate A humid continental climate is a climatic region defined by Russo-German climatologist Wladimir Köppen in 1900, typified by four distinct seasons and large seasonal temperature differences, with warm to hot (and often humid) summers, and cold ...

(

Köppen Köppen is a German surname. Notable people with the surname include: * Bernd Köppen (1951–2014), German pianist and composer * Carl Köppen (1833-1907), German military advisor in Meiji era Japan * Edlef Köppen (1893–1939), German author ...

''Dwb''), with cold and very dry winters, and warm, humid summers. The monthly 24-hour average temperature ranges from in January to in July, and the annual mean is . June thru September accounts for over three-fourths of the of annual precipitation. Due to the high elevation and dry climate, the

diurnal temperature variation In meteorology, diurnal temperature variation is the variation between a high air temperature and a low temperature that occurs during the same day. Temperature lag Temperature lag, also known as thermal inertia, is an important factor in diur ...

averages annually.

References

Citations

Bibliography

www.xzqh.org

* . * . County-level divisions of Shanxi Shuozhou {{Shanxi-geo-stub