What does my North-South poem mean?

By describing the beautiful scenery in the south and the north, the author praised the profound culture, expressed his love for the great rivers and mountains in his hometown, praised the rich culture of the motherland, expressed his ardent expectation for the early reunification of the motherland, and was full of confidence in the rejuvenation of his home country.

My south is also the south of Liu Yong and Li Yu. A river of spring water flows eastward, leaving a beautiful past and fragrance like falling flowers. When I woke up from my dream, the sadness that was fixed on the waning moon in Yang Liuan was destined to be fixed on the sad face of a talented woman and a beautiful woman in the south. ...

My north is also the north of Li Bai and Gao Shi. Smoke billowed and horses waved reins. In the flying snow in August, the northern soldiers riding horses and drinking wine are marching into the battlefield of swords and shadows. All the victories and defeats finally turned into rows of Populus euphratica under the boundary of Lengyue. ...