In ancient scripts 丁 was written in two different ways: (1) depicting the walls of a city, which is now written as 圍, or (2) depicting a nail, which is now written as 釘.
Character Evolution
Oracle Bone~1250-1000 BCOracle Bone~1250-1000 BCOracle Bone~1250-1000 BCOracle Bone~1250-1000 BCOracle Bone~1250-1000 BCBronzeEarly Western Zhou~1000 BCBronzeEarly Western Zhou~1000 BCBronzeEarly Western Zhou~1000 BCBronzeLate Western Zhou~800 BCBronzeSpring and Autumn771-476 BCBronzeEarly Spring and Autumn~700 BCBronzeEarly Warring States~400 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealWarring States (Chu)475-221 BCSealWestern Han202 BC-9 ADSealShuowen~100 ADClericalQin221-206 BCClericalWestern Han202 BC-9 ADClericalWestern Han202 BC-9 ADClericalEastern Han25-220 ADRegularModern
