HSK 2
Tā xīwàng jiāqiáng Zhōngwén xuéxí.
He hopes to strengthen his Chinese studies.
HSK 4
Wǒmen yào jiāqiáng ānquán guǎnlǐ.
We need to strengthen safety management.
HSK 4
Guójiā jiāqiáng le huánjìng bǎohù.
The country has strengthened environmental protection.