What does the first sentence of a poem do like the title?

A: It plays a key role, making the finishing point and breaking (the theme).

Example:

The wind in my hometown (fragment)

One poem at a time.

Hometown wind

Warm

This is it.

Send me as a "learning boy"

Recite and respect Confucius

Hometown wind

Powerful

This is it.

Send me on a trip

Be loyal to one's country

Bathing hometown wind

…………………

-hit the oil Weng! Books and gifts