I don’t know how your friend did it. There must be more of the thin wooden stick on the horizontal axis and less on the thick axis, right? In the mounting of traditional Chinese paintings, this is called "the sky is big and the earth is small", which is the vertical "middle hall". How can you draw something horizontally and give it away?

You should change it yourself. Brush the thick shaft with water, slowly pull it down, wrap it with a thin wooden stick, and tie it with a ribbon. Remove a section of the extra part over there. You can do it yourself, but it's a bit troublesome.

Is it mounted horizontally like this?