chēnɡ
两手撑着下巴沉思。
liǎng shǒu chēngzhe xiàba chénsī.
Resting chin on both hands, deep in thought.
撑船。
chēng chuán.
To pole/punt a boat.
说得他自己也撑不住，笑了。
shuō de tā zìjǐ yě chēng bù zhù, xiào le.
He spoke until even he himself couldn't hold it in anymore and laughed.