Yáng Yànguó 楊彥國 (DILA Authority A001442; Sòng dynasty, lifedates not securely recorded) was a Sòng-period lay Buddhist scholar styling himself Tài-lǎo jū-rén 太姥居人 (“Recluse of Mt Tài-lǎo”, a peak in modern Fú-jiàn). He is known almost solely for a single work: the Léngqié jīng zuǎn 楞伽經纂 (KR6i0341 / KR6i0342), a compendium-and-commentary on the Liú-Sòng [[KR6i0327|Léngqié-ābá-duōluó bǎo jīng 楞伽阿跋多羅寶經]] (T670) of 求那跋陀羅. The work is preserved both in the Wàn-zì Xuzangjing (X325) and, with a separate textual lineage, in the modern Zhōnghuá canon (C1821, where the recension carries 求那跋陀羅’s parent translation as the head-text and Yáng Yànguó’s annotations as the quán-zhù 詮注 below). The doubled transmission (X325 / C1821) is one of the few cases in the Laṅkāvatāra commentarial corpus where a Sòng work survives in two textually distinct forms. The author’s preface frames the Laṅkāvatāra in the canonical Chán-school terms: Bodhidharma’s “I have four fascicles of the Léngqié” — the line that gave the early Chán tradition its sūtric authority.