Xuan writing brush or Xuanbi (simplified Chinese: 宣笔; traditional Chinese: 宣筆; pinyin: Xuān Bǐ), is a type of ink brush made in Anhui Province, China.
In ancient times, Jingxian County was under the jurisdiction of Xuanzhou Prefecture (宣州府; Xuān-Zhōu Fǔ; currently Xuancheng), so its name bears the character Xuan (Xuān).
The Xuan brushes gained popularity during the Jin dynasty (256–420) among classic scholars, governmental officials, calligraphists, and painters.
During and after Tang dynasty, Xuan writing brushes had been continuously listed as a local tribute to the Chinese emperors and their royal courts.
The most famous Xuan ink brushes are elaborately made of brownish rabbit hair.