Correct

收心

/ shōuxīn / 
Strokes

Definition

to concentrate on the task/to curb one's evil instincts

Example

As a Verb

get into the frame of mind for work/study; concentrate on more serious things

1
Zhè
这
háizi
孩子
xiànzài
现在
wán
玩
yě
野
le
了
  
,
shōu
收
bù
不
zhù
住
xīn
心
le
了
  
。

The child can't get his mind off play now.

2
Nǐ
你
děi
得
ràng
让
xuésheng
学生
shōuxīn
收心
  
。

You must have the students settle down to their studies.