What is the main content at the end of Huang's poems? What thoughts and feelings did the author express?

Ah, friend!

With his heroism,

Vilen in Asia;

It shows the spirit of our nation:

Great and powerful!

Here, we celebrate the Yellow River.

I stood on the top of a high mountain and watched the Yellow River roll eastward.

The surging waves set off a huge wave;

Turbid flow turns around and forms a zigzag chain;

From the foot of Kunlun Mountain to the edge of the Yellow Sea,

Split the Central Plains in two.

Ah! Yellow River!

You are the cradle of our nation!

Five thousand years of ancient culture originated from you;

How many heroic stories are staged around you!

Ah! Yellow River!

You are great and strong, appearing on the plains of Asia like a giant.

Build a barrier for our nation with your heroic body.

Ah! Yellow River!

You poured down, majestic, and stretched out thousands of iron arms to the north and south banks.

The great spirit of our nation,

Will grow under your cultivation!

Heroes and sons and daughters of our motherland,

Will learn from you,

As great and strong as you!

As great and strong as you! Poets in Ode to the Yellow River sing praises to the Yellow River in a symbolic way, expressing the author's thoughts and feelings of singing praises to our nation, inspiring Chinese sons and daughters to be "great and strong" like the Yellow River, and defending the Yellow River and China with heroism and strong determination.