author
Known only through a surviving late-imperial Chinese novel, this little-documented writer is credited in Project Gutenberg as the author of Feng Yue Jian (風月鑒). Almost nothing certain seems to be recorded about the person behind the name, which gives the work an added air of mystery.

by active 19 century Yitang Wu
Yitang Wu is listed by Project Gutenberg as a 19th-century author, with the Chinese name 吳貽棠, and is credited there with Feng Yue Jian (風月鑒). Beyond that basic attribution, reliable biographical details appear to be very scarce.
Because so little confirmed information is readily available, it is safest to think of Yitang Wu as a largely obscure figure associated with one surviving work rather than as a well-documented literary personality. For readers, that means the book itself remains the clearest window into the author's world.