surname Cheng; short name for Chengdu 成都[Cheng2 du1]
Depicts defending city walls (丁) with an axe (戌). 丁 also represents the sound. Based on the original meaning "city", now written as 城. The current meaning is a phonetic loan.
《說文》：“成，就也。从戊，丁聲。，古文成从午。”
city