The yazheng is a Chinese string instrument. It is a long zither similar to the guzheng but by scraping with a sorghum stem dusted with resin, a bamboo stick, or a piece of forsythia wood. The instrument was popular in the Tang Dynasty, but is today little used except in the folk music of some parts of northern China, where it is called ''yaqin'' .
The Korean ''ajaeng'' is derived from the ''yazheng''.
In 2002, the People's Republic of China released a postage stamp featuring the instrument.
The ''zhengni'' is a similar instrument used by the Zhuang people of the southern Chinese province of Guangxi.