Yān (simplified Chinese: 燕国; traditional Chinese: 燕國; pinyin: Yān'guó) was a state during the Western Zhou, Spring and Autumn and Warring States Periods of Chinese history. Its capital was Ji (nowadays Beijing, also known as Yanjing, "capital of Yan"). During the Warring States period, the capital was also moved to its lower capital at Xiadu at times, which was the largest city in terms of area at the time.

The history of Yan began in the Western Zhou (1046–771 BC). After the authority of the Zhou king declined during the Spring and Autumn Period (771 to 403 BC), Yan survived and became one of the strongest states in China. During the Warring States Period (475-221 BC), Yan was one of the last states to be conquered by the armies of Qin Shihuang: Yan fell in 222 BC, immediately before the founding of the Qin dynasty (221-207 BC). Yan experienced a brief period of independence after the collapse of the Qin dynasty, but was eventually absorbed by the victorious Western Han Dynasty (202 BC – 9 AD).

Yan may refer to:

State commonly refers to either the present condition of a system or entity, or to a governed entity (such as a country) or sub-entity (such as a province or region).

Yan Pascal Tortelier (born 19 April 1947) is an internationally renowned French conductor and violinist, and is the son of the great cellist Paul Tortelier.

Born in Paris, Tortelier has worked and recorded extensively with the BBC Philharmonic Orchestra in Manchester — for whom he was Principal Conductor from 1992 to 2003. He also made an acclaimed recording of French music with the cellist Julian Lloyd Webber which included the cello concertos of Saint-Saens and Honegger for Universal Classics. He is also currently the Principal Guest Conductor of the National Youth Orchestra of Great Britain (NYOGB).

Tortelier served in the newly-created post of Principal Guest Conductor of the Pittsburgh Symphony Orchestra from 2005 to 2008. He is currently the Principal Conductor of the Orquestra Sinfônica do Estado de São Paulo (OSESP).

Yan Yan was a general of Shu Han during the late Han Dynasty and Three Kingdoms period of Chinese history. Yan began his career as a general serving under the warlord Liu Zhang of Yi Province.

In Luo Guanzhong's historical novel Romance of the Three Kingdoms, Yan Yan was defeated captured by Zhang Fei in 212 in one of the battles during Liu Bei's takeover of Yi Province. Yan firmly refused to surrender and made strong accusations at Liu Bei, which angered Zhang Fei. Zhang wanted to have him executed but changed his mind later as he was impressed with Yan's strong sense of loyalty. Zhang released Yan and succeeded in persuading Yan to join Liu Bei's forces.

Yan appeared in a later chapter during the Battle of Mount Dingjun, where he volunteered to lead an army to attack the enemy forces under Cao Cao together with Huang Zhong.