Zhè fú zì shì shūfǎ dàshī de mòjì, fēicháng zhēnguì.
This piece of calligraphy is the original work of a master and is very precious.
Tips
usage
墨迹 has two meanings: literal ink marks or stains, and the original handwritten works of calligraphers or artists (a more elevated usage). In dialects, 墨迹 (mòji, neutral tone) also means 'to dawdle' — a completely different usage.