Correct

力作

/ lìzuò /
Strokes

Definition

to put effort into (work, farming, writing etc)/a masterpiece

Example

As a Verb

work hard; labour; toil

1
Zài
dàotián
稻田
zuò
力作

labour in the rice field

As a Noun

masterpiece; tour de force

2
Zhè
shì
jìn
nián
de
zuò
力作
  

The work is his tour de force in recent years.