Install the protective fence to ensure "stringent, straight, uniform, and aesthetically pleasing." The line should be sealed tightly, with no gaps; it should run straight along the route without varying in distance; the top and bottom of the fence should have a smooth and even transition vertically, without fluctuations in height; the overall appearance should be attractive, avoiding a sense of disarray. Before installation, the ground should be leveled, and the bottom of the fence should be designed to be 10 cm above the ground. If this requirement is not met, backfilling should be performed.