Why is the road in Mount Wutai called gravel line?

1. The area has special geological conditions and the soil is mainly composed of sand and gravel. Gravel line refers to an asphalt road or cement road where the pavement materials are mainly gravel and sand, rather than asphalt or cement as the main material.

2. Due to the high terrain of Mount Wutai, complex climatic conditions, and the impact of wind and rain all year round, the use of sand and gravel as pavement materials can better adapt to climate change and prevent the impact of natural disasters such as landslides and freezing. Road damage.

3. To sum up, the road in Wutai Mountain is called the gravel line.