One ren is approximately equal to 213 centimeters or 264 centimeters.
The poem comes from "Two Ci Poems of Liangzhou"
Original text: Far above the Yellow River among the white clouds, there is an isolated city called Wanren Mountain.
Interpretation: Looking across, the Yellow River is getting further and further away, as if it is running among the swirling white clouds. In the tens of thousands of high mountains in the upper reaches of the Yellow River, an isolated city, Yumenguan, stands there, looking lonely and lonely. . Extended information
The first two sentences of one of the poems in "Two Poems from Liangzhou" describe the vast and majestic scenery of the northwest frontier. The first sentence captures the special feeling of looking at the Yellow River from bottom (stream) up (stream), from near to far, and depicts a moving picture of "the Yellow River is far up among the white clouds": the turbulent Yellow River is like a ribbon flying up cloud.
The second sentence "an isolated city in Wanren Mountain" shows the isolated city on the fortress. This is one of the main images of this poem and belongs to the main part of the "picture scroll". "The Yellow River is far above the white clouds" is its distant background, and "Wanren Mountain" is its close background. Against the background of the mountains in the distance, we can see that the city is in a dangerous terrain and is in a lonely situation. In the second sentence, the image of "lonely city" is introduced first, which prepares the next two sentences for further characterization of Zheng's husband's psychology.