Zhèng Yùdào 鄭玉道 (Southern Sòng) was a county magistrate (lìngjūn) of an unspecified locality in the early Southern Sòng. He composed the Yù sú biān 諭俗編 in 1 juàn — a moral-instructional pamphlet for the common people of his rural district, aimed at xiān jiàohuà hòu xíngfá (instruction first, punishment second) — which formed the basis of the later compiled Qín táng yù sú biān (KR3j0126). The Sòng shǐ Yìwén zhì records it as 1 juàn, classed in zǐbù zájiā (and a duplicate appearance in shǐbù xíngfǎ lèi — which the Sìkù editors flag as a misclassification).