Xu Collection, Upper Volume Radical: Metal (jīn) Character: Lang Kangxi Strokes: 15 Page 1306, Entry 01 Pronounced lang. Shuowen Jiezi (Shuowen): Langdang, a chain or shackle. Book of Han (Hanshu), Treatise on the Five Elements: Written as langdang. To use an iron chain to lock his neck. Liushu Gu (Liushu gu): Such things as langdang are interconnected, pulling on each other, and heavy. Therefore, in popular usage, a state of distress and heaviness in which one cannot move is referred to as langdang. Also, Guangyun (Guangyun): One source states it is the sound of a bell.