《周礼·冬官考工记·弓人》
冬季剖析干材就比较容易治理好，春季煮治角就较易使角柔韧，夏季治理筋就不会紊乱，秋季再用胶、漆、丝组合干、角、筋三种材料就坚固而严密，冬寒季节固定弓体张弦时就不再变形，隆冬冰冻时检验。漆纹就皲易确定环形的漆纹是否符合要求，到下一年春季再安上弦，就是整整一年的事情了。
冬析干则易，春液角则合，夏治筋则不烦，秋合三材则合，寒奠体则张不流，冰析灂则审环，春被弦则一年之事。
Dry wood is cut in the winter to make it easier to process, and horn is boiled in the spring to make it easier to soften. The tendons are processed in the summer to prevent them from becoming disordered. In the autumn, glue, lacquer, and silk are used to combine the wood, horn, and tendons to make them strong and tight. When the bow body is set in the winter and tightened with a string, it will no longer deform. The lacquer pattern is tested in the depths of winter. It is easy to determine whether the circular lacquer pattern meets the requirements. In the spring of the following year, the string is put on, which takes a whole year.