Rouge Inkstone

Zhiyanzhai (脂硯齋/脂砚斋; pinyin: Zhī Yànzhāi, literally: "Rouge Inkstone Studio", sometimes translated as Red Inkstone or Rouge Inkstone) was the pseudonym of an early and mysterious commentator of the 18th-century Chinese novel Dream of the Red Chamber. This person was a contemporary of the author Cao Xueqin who knew the author intimately enough to be regarded as the chief commentator of his work while it was still unpublished.

Most early hand-copied manuscripts of the novel contain red or black-inked commentaries by a few unknown commentators, considered authoritative enough to be transcribed by scribes into subsequent generations of copies. Zhiyanzhai was the most prominent of these commentators. Early copies of Dream were known as 脂硯齋重評石頭記 ("Zhiyanzhai's Re-Annotations to The Story of the Stone"). These versions are known as 脂本, or "Rouge Versions", in Chinese. They are the manuscripts with the highest textual reliability.

Zhiyanzhai had clearly finished reading Cao's completed draft to reveal details which would otherwise be lost to later generations. It was mostly through Zhiyanzhai's comments that scholars learn (even if fragmentarily) about some passages and incidents in the original ending. Zhiyanzhai also conclusively identified the work as Cao Xueqin's. Orthodox Redologists rely extensively on Zhiyanzhai's notes for research and scholarly conjectures, although the identity of Zhiyanzhai remains a mystery.