Open-work charms (simplified Chinese: 镂空钱 / 玲珑钱; traditional Chinese: 鏤空錢 / 玲瓏錢; pinyin: lòu kōng qián / líng lóng qián; lit. 'Hollowed out money / Elegant money') are a type of Chinese, Japanese, Korean, and Vietnamese numismatic charms characterised by irregularly shaped "holes" or "openings" between their design elements known as openwork. The design of the amulets represent yin while the holes represent yang and their general purpose was to attract good fortune and ward off evil spirits and misfortune. Unlike most other types of Chinese numismatic charms which usually tend to have square center holes if they’re holed, open-work charms tend to almost exclusively have round center holes though open-work charms with square center holes are known to exist and certain thematic open-work cha