Erjiaxian Opera, also known as Liangjiaxian or Dawuyin opera, is a traditional opera popular in western Shandong, eastern and northern Henan, northern Jiangsu and northern Anhui province.

The opera features a musical instrument called “Sihu”, a four-stringed urheen. With a unique vocal and musical style, the opera has been popular for over 100 years.

In 2008, it was included in the National Intangible Cultural Heritage list.