tsin-tsiak真跡

original handwriting

original handwriting, calligraphy or painting (especially of a famous person); authentic work (of painting or calligraphy)

English Wiktionary, “真跡” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E7%9C%9F%E8%B7%A1 · confidence: Medium (Wiktionary, Hokkien)