What does the previous sentence mean "no more mountains and gas"?

The previous sentence is: only the sky is above.

Origin: Ode to Huashan is a poem written by Kou Zhun, the prime minister of the Song Dynasty, when he was seven years old. Kou Zhun and her husband couldn't help reciting this poem when they climbed Huashan Mountain. The main idea of the poem is: Except the blue sky, all the mountains far and near are at the foot of Huashan Mountain. The sun looks so close that white clouds are floating on the mountainside.

The whole poem is as follows:

There is only the sky above, not the mountains and the atmosphere.

Look up at the red sun and look back at the low white clouds.

Only the sky is above, there is nothing higher than this mountain. Looking up is close to the red sun, looking down is the white clouds below.

Extended data

Huashan Mountain in the poem, called Taihua Mountain and Xiyue Mountain in ancient times, is located in huayin city, Weinan City, Shaanxi Province. Since ancient times, there has been a saying that "the mountain is the best in the world", and literati in past dynasties have also left countless poems chanting Huashan.

The language of this poem is very concise and clear. There is not a rare word in the whole poem, but it naturally shows the lofty majesty of Huashan. "Only the sky is above, there is no mountain." Two sentences directly describe the height of Huashan Mountain. Only Zhanzhan Sky is above Huashan Mountain, and no other mountains are side by side with it. From the beginning, there is an extraordinary momentum.

Then use the words "looking up at the red sun and looking back at the low white clouds" to further show the majestic Huashan Mountain. Red sun and white clouds are in the sky. However, the red sun seems to be close at hand at this time, and even the white clouds seem to be under the peak of Huashan Mountain.