Correct

细水长流

/ xì shuǐ cháng liú / 
Strokes

Definition

lit. thin streams flow forever/fig. economy will get you a long way/to work steadily at something little by little

Example

Definition

economize (resources) to avoid running short; be economical; stint (on) in order to ensure longer use

1
Yòng
用
qian
钱
yào
要
xìshuǐchángliú
细水长流
  
。

Stint on money, or it may run short.

Definition

do sth gradually but perseveringly

2
Xuéxí
学习
bù
不
néng
能
tūjī
突击
  
,
yīnggāi
应该
xìshuǐchángliú
细水长流
  
,
rìjīyuèlèi
日积月累
cái
才
háng
行
  
。

You can't expect to master everything within a short period through a burst of effort. Instead, you've got to persist in your efforts.