bamboo slips
竹简 zhujian xhu_jian Bamboo_and_wooden_slips
Bamboo and wooden slips (simplified Chinese: 简牍; traditional Chinese: 簡牘; pinyin: jiǎndú) are long, narrow strips of wood or bamboo, each typically holding a single column of several dozen brush-written characters. They were the main media for writing documents in China before the widespread introduction of paper during the first two centuries AD.