Jinsha water swats the cliff, warms the crosspiece of the bridge, and keeps the cold. What's the beauty of slapping horizontally?

The waves of Jinsha River beat against the steep banks, and the water vapor transpiration gives people a warm feeling. In cold weather, the Red Army captured the bridge, and the iron cable of Luding Bridge hung on the rapids, giving people a cold feeling. A "warm" and a "cold" not only write about the weather, but also write about psychological feelings. The author compares the two feelings, which not only expresses the joy of the Red Army after crossing the Jinsha River, but also shows the thrilling capture of Luding Bridge, showing the incomparable bravery of the Red Army. "Beat" and "horizontal" are also dynamic and static. This couplet is natural and neat, and the infinite feelings in the natural environment are magnificent.