Correct

嘿嘿

/ hēihēi / 
Strokes

Definition

(onom.) he he/mischievous laughter

Example

As an Onomatope

(of laughter, esp of sneer) ha ha

1
Hēihēi
嘿嘿
  
,
zhè
这
huí
回
wǒ
我
yíng
赢
dìng
定
le
了
  
!

Haha, I'll sure win this time!