HSK 3
Háizi men de xiàoshēng chōngmǎn le zhěnggè yuànzi.
The children's laughter filled the whole courtyard.
HSK 4
Jiàoshì lǐ chuánlái zhènzhèn xiàoshēng.
Bursts of laughter came from the classroom.
HSK 7-9
Tā de xiàoshēng hěn yǒu gǎnrǎnlì.
Her laughter is very infectious.