"Yi Zhi Plum Blossoms" and "Yuzhuan Chi Su" both refer to letters sent by friends to convey messages of comfort. "驿" refers to the messenger, and "鱼" refers to the shape of a fish. In ancient times, ruler was a special term for letters, and plum blossom was borrowed from it.
The two sentences come from "Jingzhou Ji" and "Drinking Horses and Walking on the Great Wall" respectively. Both are synonymous with delivering letters.
The word "build" is to visualize the invisible sadness, as if it can also be piled up and piled up into a wall of "hate". The reason for the hatred is that I have drifted away due to the party's misfortune.