Yanshan is a county

County

A county is a jurisdiction of local government in certain modern nations. Historically in mainland Europe, the original French term, comté, and its equivalents in other languages denoted a jurisdiction under the sovereignty of a count A county is a jurisdiction of local government in certain...

 in Shangrao

Shangrao

Shangrao is a medium-sized prefecture-level city located in the northeast of China's Jiangxi province. According to the 2010 Census, Shangrao has a population of 6,579,714 inhabitants....

 Municipality, in north-eastern Jiangxi

Jiangxi

' is a southern province in the People's Republic of China. Spanning from the banks of the Yangtze River in the north into hillier areas in the south, it shares a border with Anhui to the north, Zhejiang to the northeast, Fujian to the east, Guangdong to the south, Hunan to the west, and Hubei to...

 province.

Situation

It borders Hengfeng County

Hengfeng County

Hengfeng County is a small county under the administration of Shangrao city, Jiangxi...

 to the north, Shangrao County

Shangrao County

Shangrao County is a county of Jiangxi province, People's Republic of China. It is under the jurisdiction of the prefecture-level city of Shangrao.- External links : -...

 to the east, Wannian County

Wannian County

Wannian is a county under the jurisdiction of Shangrao City in Jiangxi, China.Its total area is 1140.76 square kilometers. Its 2003 population was 361,000.Under Wannian County are 6 towns and 9 townships....

 and Guixi City

Guixi City

Guixi is a county-level city in Yingtan Municipality, Jiangxi Province, in southeastern China.The city covers two-thirds of the land area in the municipal region...

 (in Yingtan

Yingtan

Yingtan is a prefecture-level city in the east part of China's Jiangxi province. It borders Fujian province to the east. Its location next to Fujian and its proximity to Zhejiang, have made it a strategically important city for centuries...

) to the west and Wuyishan City and Guangze County

Guangze County

Guangze County is a county of Fujian Province, China. It is under the administration of Nanping city....

 (both in Nanping

Nanping

Nanping is a prefecture-level city in northwestern Fujian province, People's Republic of China. It borders Ningde City to the east, Sanming City to the south, and the provinces of Zhejiang and Jiangxi to the north and west respectively...

, FJ

Fujian

' , formerly romanised as Fukien or Huguing or Foukien, is a province on the southeast coast of mainland China. Fujian is bordered by Zhejiang to the north, Jiangxi to the west, and Guangdong to the south. Taiwan lies to the east, across the Taiwan Strait...

) to the south.

Waterways

Hekou town sits on the Xinjiang River (信江), a tributary to Boyang Lake in the lower Yangzi River watershed.

Administration

The county seat, by Chinese convention often also called Yanshan, is at Hekou town (河口镇).

Townships (乡, xiang)