HSK 6
Chūntiān lái le, niǎo'er kāishǐ zhùcháo fánzhí.
Spring has arrived; the birds start building nests and breeding.
HSK 7-9
Yànzi zài wūyán xià zhùcháo.
Swallows build their nests under the eaves.
HSK 7-9
Zhè duì niǎo'er zài shùshàng zhù le yīgè jīngzhì de cháo.
This pair of birds built an exquisite nest in the tree.
