Excuse me, which great god knows what this calligraphy work is written about?

This is an ancient poem.

Tang Dynasty poet → Gao Shi "Don't be a big boy, be the first"

A thousand miles away in Huang Yun,

The north wind blows goose feathers and heavy snow one after another.

Mochow has no bosom friend in the future,

Everyone in the world doesn't know you.

A poem written by Ding Haidong and Liu Qian in Beijing