C821 Go in together

On the slip of paper in my hand is the handwriting that I am most familiar with, Koo Lingjue. It says' Come to the second floor '.

But it was not signed.

I looked around, there were people coming and going, no one was paying attention to this side, this is Koo Lingjue's calligraphy is correct, but on the second floor, I looked up and there was nothing wrong with it