dà qì wǎn chéng
lit. it takes a long time to make a big pot (idiom); fig. a great talent matures slowly
in the fullness of time a major figure will develop into a pillar of the state; Rome wasn't built in a day
大
dà
big; large; great
器
qì
device
晚
wǎn
evening
成
chéng
short name for Chengdu 成都[Cheng2 du1]