Correct

纵声

/ zòngshēng / 
Strokes

Definition

loudly/in a loud voice

Example

As an Adverb

at the top of one's voice

1
Zòngshēng
纵声
gēchàng
歌唱

sing lustily

2
Zòngshēng
纵声
dàxiào
大笑

laugh heartily