A table, a chair, a fan and a ruler mean this.

This is just a sentence, and it is impossible to disassemble a single explanation.

Just: just.

Original text:

A desk, a chair, a fan and a ruler;

Explanation:

There is only a table, a chair, a fan and a ruler.

Function:

Judging from Lin Sihuan's "Kouji", the front description of this vocal performance is more complicated, which makes people think that there is a performance team behind it. The final answer is just "one person, one desk, one chair, one fan and one foot", which highlights the superb skills of the performer and reflects the author's writing skill like a composer.