Zhāng Dàchún 張大淳 was the mid-thirteenth-century Máoshān 茅山 Shàngqīng registrar who supervised the official processing of the 1249 imperial canonization of the Three Máo Brothers (Sān Máo zhēnjūn 三茅真君). He held the title Chōngjìng míngzhēn wēimiào dàshī 沖靜明真微妙大師, was specially assigned as Máoshān shānmén dàozhèng 山門道正 and acting head of the 御前 Chóngxǐ guàn 崇禧觀 — the monastery of his teacher Shǐ Tán 施湛 (hào Dòngwēi xiānshēng 洞微先生) — and was the manager of all monastic affairs on the mountain, bestowed with the purple robe. He is the compiler and author of the preface (dated the third month of 1267) to the [[KR5a0173|Sān Máo zhēnjūn jiāfēng shìdiǎn 三茅真君加封事典 (KR5a0173 / DZ 172)]], which publishes the full procedural documentation of the 1249 canonization he had witnessed as Shǐ Tán’s disciple and finally brought to print after Shǐ’s death. No CBDB record was located for him.