What are the themes of frontier fortress poems and Liangzhou Ci?

Frontier fortress and Liangzhou Ci are both poems about frontier fortress.

Fortress mainly laments the sufferings of the expedition and the good soldiers, and embodies the poet's love and maintenance of his home country, his longing and expectation for the victory of the war, and his confidence in the good soldiers.

Original: There was a bright moon in the Qin Dynasty, and it was closed in the Han Dynasty. People did not return on the Long March. If Wei Qing, who attacked Longcheng, and Li Guang, the flying general, were alive today, the Huns would not be allowed to go south to spend their horses in Yinshan.

It is still the bright moon and border pass in Qin and Han Dynasties, and Wan Li's conscription has not been returned. If Li Guang, the flying general of Dragon City, was still here, he would never let the Huns go south to herd horses and spend the Yinshan Mountain.

"Liangzhou Ci" depicts the special feeling overlooking the Yellow River from a special perspective, and also shows the magnificent and desolate scenery in the frontier fortress area, which is tragic and desolate and exudes a bold atmosphere.

The Yellow River is far above the white clouds, an isolated city, Wan Ren Mountain. Why use the elegy of willow to complain about the delay of spring, old Yumenguan, a spring breeze is not blowing!

The Yellow River seems to rush out from the white clouds, and Yumenguan is hanging alone in the mountains. Why do you want to complain about the late arrival of spring by playing the plaintive "Yangliuqiu" with Qiangdi? The spring breeze can't blow the Yumen Pass at all.