Due to historical stylistic changes, this component is less similar to 井 than it was in ancient scripts.
Character Evolution
BronzeMid Western Zhou~900 BCBronzeLate Spring and Autumn~500 BCSealMid Western Zhou~900 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealShuowen~100 ADSealShuowen~100 ADClericalWestern Han202 BC-9 ADClericalWestern Han202 BC-9 ADClericalWestern Han202 BC-9 ADClericalEastern Han25-220 ADClericalEastern Han25-220 ADRegularModern