What is the meaning of "A" in Guilin Mountain Water?

Translation a, the first in the sky, usually means ranking first. The scenery in Guilin is the best in the world.

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Zengbo Li's "Rebuilding Xiangnan Building" "Guilin's landscape is the best in the world, and there is no police for three years."

Wang's "Seven Laws and Two Songs": "There are thousands of peaks in ancient Guizhou, and people have always been difficult. My crown should be a saint, who is not a Taoist. Far-reaching economic talent, vertical and horizontal etiquette and music relative. Three kings and eight handsome have a rural show and sit firmly on the top of Tianjin. Guilin's landscape is the best in the world, jade Qing. Morale is not inspiring, and the literary field is like a battlefield. Tiger and leopard watch the enemy at nine levels, while Wan Li is playing. The old eyes are clear, and the gentleman fights for the south. "

Wu Mai: "Guilin's landscape is the best in the world, and Yangshuo is the best in the world. The peaks are reflected in the mountains, and there is no water, no mountains and no ecstasy. "