Yáng Yuánchéng 楊元誠 (fl. mid-Yuán), Yuán civil official, former Director of the Astronomical Service (太史令 Tàishǐlìng). At an earlier point in his career he served as prefect (jùnmù 郡牧) of the home prefecture of Wāng Rǔmào 汪汝懋 in Tóngjiāng 桐江, where he composed an earlier (now-lost) Shānjū yǎngshēng compendium which Wāng Rǔmào subsequently expanded into the surviving four-juan Shānjū sìyào 山居四要 (KR3eo013). No CBDB record; biographical details derive solely from Liú Rénběn’s 1360 preface to Wāng’s expansion.