After its effectiveness in surgical anesthesia was established worldwide, it aroused interest in modern medical circles. Historically, acupuncture was practiced widely during the Chin, Sui and Tang dynasties when great importance was attached to it every where.
針的形狀也逐漸增多，內經中已經有九針：鑱針、圓針、鈹針、鋒針、鍉針、圓利針、毫針、長針、大針；每一種針各有不同的效果和適應症。