Cuī Zhìyuǎn 崔致遠 (857–928, zì Hǎifū 海夫, hào Gūyún 孤雲, also Hǎiyún 海雲) — Korean: Choe Chiwŏn — was a Silla aristocrat (Cuī family of Sànbā / Gyeongju) who became the foundational figure of Sino-Korean classical literature. He came to Tang China at age 12 (868) to study at the Tàixué; passed the jìnshì in Xiántōng 14 (873) at age 17 — an extraordinary achievement for a foreign student. He served as Lìshuǐ wèi (sub-prefect of Lìshuǐ) and from Guǎngmíng 1 (880) as jìshì (manuscript secretary) under Gāo Pián 高駢 (military governor of Huáinán and the principal Tang general against the Huáng Cháo rebellion).
Cuī presented his Tang-period prose collection — the Guìyuàn bǐgēng jí (= KR4c0100) — to the Tang court in Zhōnghé 4 (884) before returning to Silla in 885. In Silla he served as Tàishǐlìng and Hànlín xuéshì, and produced further sìliù (parallel-prose) writings. Late in life he became a jūshì (Daoist-Buddhist eclectic layman) and traveled to Mt. Hǎiìn 海印山 (Haein-sa). His career and writings established him as the principal Korean classical-Chinese stylist of the late-Silla / early-Goryeo transition.
Principal work in the corpus: Guìyuàn bǐgēng jí KR4c0100 in 20 juǎn (SBCK reprint of his Tang official-prose corpus). CBDB id 94556 confirms 857–928.