The Eastern Xia[1] (traditional Chinese: 東夏; simplified Chinese: 东夏; pinyin: Dōng Xià), also known as Dongxia,[2] Dongzhen (東真)[3] or Dazhen (大真), was a short-lived kingdom established in Manchuria (including Northeast China and Outer Manchuria) by the Jurchen warlord Puxian Wannu in 1215 during the Mongol conquest of the Jin dynasty.

Puxian Wannu originally served the waning Jin dynasty under pressure from the Mongol Empire.

While Mukhali of the Mongol Empire invaded Northern China and captured the Jin capital Zhongdu, Puxian Wannu rebelled against the Jin dynasty and founded the Eastern Xia dynasty in Dongjing (Liaoyang) in 1215 with the support of the Mongols.

Puxian Wannu was captured and killed in the same year, which marked the official end of the Eastern Xia kingdom.

In the meanwhile Ikeuchi Hiroshi claimed that Dongzhen was an abbreviated form of Dong Nüzhen (东女眞/東女眞, Eastern Jurchen) and was just an alias.