I like to appreciate the last part of this land.

In the second paragraph of the poem, the author turns from a dynamic description of the singer to a close-up of "I". This is done by asking questions. A static close-up of "Why do I often have tears in my eyes" and "Tears in my eyes" shows the grief and pain that has been lingering in my heart for a long time. "Because I love this land deeply", witnessing the reality that mountains and rivers are broken and people are wiped by charcoal, the deeper my love for my motherland, the stronger my pain in my heart.

The last two sentences are the essence of the whole poem, and they are the confession of all patriotic intellectuals' sincere love for the motherland in that miserable era. This kind of love is not only the deep love of the poet, but also the concentration of patriotic feelings of the whole nation. Ai Qing used these two poems to express the voice of the Chinese people in that era.

What is the relationship between the second part of I Love this Land and the first part? If the second verse is removed, how will the expression of the theme of the poem be affected?

If the first section is a lyrical description of the theme of "loving the land (motherland)", then the short and pithy two lines in the second section can be regarded as a highly concise summary of the theme. Without the second verse, poetry cannot be refined and strengthened.