Zhèng Yǒuxián 鄭友賢 (late Northern / early Southern Sòng) was a Sòng military-classic commentator, author of KR5f0015 Sūn zǐ yí shuō 孫子遺說 — supplementary comments on the Sūn zǐ bīng fǎ 孫子兵法.
Zhèng Yǒuxián 鄭友賢 (late Northern / early Southern Sòng) was a Sòng military-classic commentator, author of KR5f0015 Sūn zǐ yí shuō 孫子遺說 — supplementary comments on the Sūn zǐ bīng fǎ 孫子兵法.