Can that literary expert tell me what this poem is?

This is the work of Fang Zhenguan, a calligrapher in the early Qing Dynasty, who is called "the messenger of Wan Li".

Fang Zhenguan is Fang Shitai, a native of Tongcheng, Anhui Province, in the early years of Qing Emperor Kangxi. The word Zhenguan, the word line, the word An, the number Nantang, Fang Shiju followed his brother. Deliberately for poetry, poetry is pure.

The full text is as follows: Wanli sent envoys, but it was the first step of eastward invasion. How could it be blocked? Huang Yingchuan has been sent to central Hunan, and the later period is not far away. He heard about it first, and he allowed himself to enter again. He was unprepared. When Wang Sheng was recommended by Huazhong No.3, he went to Chang 'an to be an oral teacher, and Zhong Lao had to learn orthography and be upright.