Please tell me what kind of thoughts and feelings are expressed in Yue Fei's "Man Jiang Hong"

Yue Fei's "Man Jiang Hong" expresses Yue Fei's strong and eager thoughts and feelings of worrying about the country and serving the country.

The first half of the word "Manjianghong" expresses the author's grief and indignation at the fall of the Central Plains into the enemy, regrets that the situation has been abandoned, and expresses his wish to continue to make meritorious deeds in his prime. The second part describes the author's deep hatred for national enemies, his eager desire for the reunification of the motherland and his bold loyalty to the national court.