Tán Chǔduān 譚處端 (1123–1185), zì Tōng zhèng 通正, hào Cháng zhēn zǐ 長真子, was one of the Seven Perfected of Quán zhēn, founder of the Nán wú 南無 branch. Author of KR5e0062 Shuǐ yún jí 水雲集 (dated 1229 — posthumous publication).
Tán Chǔduān 譚處端 (1123–1185), zì Tōng zhèng 通正, hào Cháng zhēn zǐ 長真子, was one of the Seven Perfected of Quán zhēn, founder of the Nán wú 南無 branch. Author of KR5e0062 Shuǐ yún jí 水雲集 (dated 1229 — posthumous publication).