The explanation of arc is a bamboo bow and a marked bow garment. The Book of Rites: "It's a pilgrimage to take an ink cart and raise a dragon flag." Zheng Xuan's Note: "Arc, so the bow is also called Lu." Jia's Gong Yanshu: "Erya said that the code is in the shape of a nest, so it is used to draw two pictures of the nest, so the cloud draws the bow of the nest." "Book of Rites Mingtang": "Lu Chun takes the road and carries the arc." Interpretation and decomposition arc → ancient wooden bow: mulberry arc. Arc vector. String wood is curved. Any segment of a circle: an arc. Arc. Radian. Electric arc. Arc lamp. Radical: bow; Interpretation of arrow → Bow bag: "With bow and arrow head." Bound by the side: Wei.