Ask idioms, poems, lyrics and stories about the Great Wall to be summarized in one sentence! ! ! urgent

Idiom: The Great Wall of Steel

Poetry: Looking at the inside and outside of the Great Wall, I am the only one. (What about Qin? Snow)

Lyrics: It is said that both sides of the Great Wall are hometown. Do you know how long the Great Wall is? The length of the Great Wall

Story: Meng Jiangnu went all the way to find her husband to send warm clothes, and her husband was tired in labor. Meng Jiangnu cried sadly over the Great Wall-Meng Jiangnu cried over the Great Wall.