Said Prof. Sung: "The rings with protuberances have been found all over Taiwan as well as in the southeastern Philippines, and the Malay and Indochinese Penisula, while those without such distinguishing marks have been found along the coast of the Chinese mainland and in Korea and Japan.
據宋教授分析，通常有突起的玉玦，分佈在台灣、菲律賓南部、馬來半島、印尼、和中南半島等地；沒有突起的分佈在大陸沿海、韓國和日本。