Litchi noodles are made by striking a hammer shaped like lychee skin on the surface of granite or chiseling small holes densely on the granite surface with a chisel, thereby forming a rough surface resembling lychee skin on the stone surface. They are commonly seen on pedestrian walkways or square pavements. It has anti slip effect on the ground, deepens the rough and heavy feeling on the wall, absorbs light and heat, has no large-scale reflection, and can also increase the sense of three dimensionality.