1. Layout work involves precise marking of the field lines. The central stake is used to determine the exact location of the site, while the coordinate method ensures accurate placement of the four corners. Diagonal measurements are taken to verify the size and angles of the field, or alternative methods can be used for checking.

During the leveling phase of each structure, a square grid method is employed for height control, rather than using vertical and horizontal slope techniques. The square grid size is set at 5 meters by 5 meters to maintain uniformity and precision.

2. Once the earthwork is completed, full-site compaction is carried out using a roller. Light rolling or vibratory compaction is applied, with the roller weight not less than 12 tons. The purpose is both to level the ground and to make it dense and uniform, preventing uneven settlement and large fluctuations in elevation. Any high areas should be cut down, and low areas filled, ensuring a compaction density of up to 95%. No loose soil should remain, and if there is any slush, it must be fully treated. Relying only on bulldozers for leveling is not recommended, as uneven settlement may occur later, affecting the lawn's performance and maintenance.

3. The gravel layer plays a crucial role in drainage. The materials used must be clean and free from debris. After application, the layers should be compacted in sections, with each layer no thicker than 20 cm. After paving, large crawler bulldozers can be used to roll the entire field at least twice to ensure even distribution and stability.

4. For blind ditch construction, trenching is performed after the first drainage gravel layer is laid. Each blind ditch must have a proper drainage gradient, with smooth channels and no obstructions that could cause water pooling. After placing the filter pipe, gravel is placed on both sides and compacted. A layered filling approach is used—large gravel, then coarse, fine gravel, and sand—ensuring no random mixing. Finally, the excavated soil is removed from the site.

5. Currently, backfill sand is sourced from riverbeds or mountain sands, which often contain harmful bacteria, nematodes, and weed seeds. Therefore, disinfection is necessary during soil mixing to eliminate these contaminants. Previously, a waiting period was required after the sand arrived before sterilization could take place.

6. To enhance the stability of the grass seedlings, a tensile material layer is installed beneath the topsoil. This grid-like material has openings no larger than 1 cm, allowing the grass roots to pass through and interlock, increasing their resistance. This prevents large areas of turf from lifting off the soil during athletic activities.

7. Before planting the grass, a final measurement is conducted to check the elevation and slope, ensuring the surface is properly leveled. The general flatness deviation should not exceed 1 cm to guarantee a smooth and even playing surface.

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