一雨成秋

a sudden shower towards the end of summer brings an abrupt arrival of autumn (idiom)

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

rain / CL:陣|阵[zhen4],場|场[chang2]

(literary) to rain / (of rain, snow etc) to fall / to precipitate / to wet

surname Cheng

to succeed / to finish / to complete / to accomplish / to become / to turn into / to be all right / OK! / one tenth

autumn / fall / harvest time

old variant of 秋[qiu1]

see 鞦韆|秋千[qiu1 qian1]