When Su Cheng was seventeen years old, he learned the last way to close the edge of the reed mat - press the mat with three fingers, turn the wrist in a half arc, and bend the reed strips gently along the palm lines. On the river beach in the summer night, Lin Yue rested her forehead on his shoulder and said, "I will marry you when your curves become one." The following year, she left with the wave of migrant workers going south. From then on, they were at odds with each other and it was difficult to embrace each other. Twelve years later, Su Cheng became the youngest edge trimmer on the county-level intangible cultural heritage list. However, on the quality inspection report of a batch of export orders, he saw the signature of Lin Yue as the factory representative of a third-party testing agency. The reed fibers swelled and deformed in the humidity day and night, and their edge curvature finally aligned with the teeth again in the gap between quality inspection standards and manual temperature. Local intangible cultural heritage grasses are craftsmen, reeds have memories, and people have obsessions. If the river bank cannot be crossed, I will build a bridge myself.