What gift should a friend give when he moves to a new house so that he can give calligraphy?

You can send calligraphy: where there is a will, there is a way.

All-China Federation means that people who can do great things have perseverance and the courage to cross the rubicon. This couplet is neat, subtle and philosophical. Its greatest feature lies in the flexible and innovative use of allusions, and the combination of up and down echoes nature and is consistent, such as flowing water.