What poem should I write when I send my friend calligraphy?

Li Bai's Farewell is good, with great artistic conception and sincere feelings.

To the north of the Great Wall is a blue mountain range, and to the east is a white waterline.

Here, you must leave me and drift away for hundreds of miles like loose grass.

I will think of you in the clouds, so think of me in the sunset.

We waved goodbye and my horse neighed again and again.