Explore each form from the oldest known stage to today.
The character 二 (èr) is one of the simplest and most ancient Chinese characters, representing the number two. Its evolution shows remarkable consistency - from oracle bone inscriptions to modern script, it has consistently been depicted as two horizontal lines of equal length. This character exemplifies the principle of '指事' (zhǐshì) or indicative characters in Liushutong classification, where abstract concepts are represented by simple symbols. The bottom line was sometimes slightly longer in ancient forms, but standardized to equal lengths in clerical script. Beyond just numerical value, 二 carries philosophical significance in Chinese thought, representing duality, pairs, and the concept of yin-yang complementarity. Arrived in Japan: The character 二 arrived in Japan during the Yayoi period (300 BCE - 300 CE) through cultural exchange with China, but became systematically established with the introduction of Chinese writing systems in the 5th century CE, particularly through Korean scholars and the transmission of Buddhist texts. It was adopted as 'ni' or 'futa' in Japanese readings and remains one of the most fundamental characters in Japanese writing.