In episode 7, it was played:

There are several words written by Haining on the town paper: "Seven Analects of Confucius" all show that Haining laughs at himself.

It's not an allusion, but an event surrounding the Seven Analects of Confucius. You can watch this TV series specifically.

I haven't found the expression "Seven Analects of Confucius" anywhere else, so it's probably from this TV series.

Well, the landlord seems to have misunderstood the meaning of mo007nica. When he said that "all seven articles of the Analects of Confucius are out of my personal space", he actually listed "all seven articles of the Analects are out of my personal space", not his own space. O(∩_∩)O~