"In my back garden, you can see two trees outside the wall, one is a jujube tree, and the other is also a jujube tree." Lu Xun was talking about two trees, and the previous sentence did not indicate it. Tell me what kind it is. And "I have two cousins, one is a girl and the other is also a girl." The "cousin" is already a girl, so the rest will be repeated.

Although I have not read this article by Lu Xun, I should be able to guess that there should be a plot related to this sentence.