Correct
费工夫
/ fèigōngfu /
Strokes
Definition
to spend a great deal of time and effort/(of a task) demanding/exacting
Example
As a Verb
take time and energy; be time-consuming
1
Gàifáng
盖房
shì
是
jiàn
件
hěn
很
fèigōngfu
费工夫
de
的
shì
事
。
House-building is time-consuming.
2
Fèigōngfu
费工夫
de
的
huór
活儿
exacting job