Ya'an

'''Ya'an''' () is a prefecture-level city in the western part of Sichuan province, China, located just below the Tibetan Plateau. The city is home to Sichuan Agricultural University, the only 211 Project university and the largest regional comprehensive university in Ya'an. As of the 2020 Chinese census, Ya'an has a population of 1,434,603.

==History== thumb|A surviving element of the que (tower) (gate tower) at the Tomb of Gao Yi, ca. 209 CE thumb|A bridge with ancient Chinese architectural features, across Qingyi River (Sichuan)|Qingyi River, at town centre of Ya'an Previously known as Yazhou-fu, the city is first mentioned during the Zhou dynasty (1122–255 BCE). It served as a county seat during the Qin and Han dynasties, but was subsequently taken by nomadic tribes. After being reintegrated into the Chinese Empire in the late 5th century, it was made the seat of the Ya Prefecture in 604. The modern Ya'an county was established in 1912. It became the provincial capital of Xikang province in 1951, but has been a municipality under the administration of Sichuan province since 1955, when Xikang province was merged and became a part of Sichuan province.