Other names: Yazheng
Family:Strings
Description:
it is a korean instrument .Ajaeng is included to the instrument of dangak.
Appears on:
The instrument is used in court, aristocratic, and folk music, as well as in contemporary classical music and film scores.
Comments:
The Ajaeng arrived in Korea from China during the Koryŏ dynasty (918–1392). 

Links:

https://en.wikipedia.org/wiki/Ajaeng

https://www.britannica.com/art/ajaeng

https://www.youtube.com/watch?v=ThdsRHnyf6c