There is more than one version of A Dream of Red Mansions recognized by Zhi Yanzhai. At that time, books were published, unlike tens of thousands of copies printed when there is a market now. Many times, it needs to be copied by hand, so every time it is copied, there is a change, which makes a dream of red mansions appear in many versions, from Stone, Jinyuyuan and Twelve Women in Jinling to the most popular dream of red mansions. This is also an important branch of redology and edition science. Modern printing often needs to add some words after each time, which brings some inconvenience to reading, but more importantly, many missing parts have been found in such research, such as Lin Daiyu's eyebrows, "a pair of crying eyes; Two wisps of smoke eyebrows that seem to frown but don't frown were found in Russian fat batch.
As for the fat batch, it is not only published once. In many publications, anything that retains the comment on writing by Zhi Yanzhai is called Red Yanzhai's Comment on a Dream of Red Mansions. Similarly, in order to distinguish different versions, add a date or the name of the reviser before the word "Zhi Yanzhai". This is the origin of JOE. In other words, Zhi Yanzhai's comment on writing is in the margin next to it.