侄孙

zhí sūn hé wài sūn qū bié bù dà

侄孙和外孙区别不大。

A grandnephew is almost the same as a grandson.

tā shì wǒ de yī gè zhí sūn yī xiàng yuǎn lí jiā tíng zài wài dì guò zhe jūn yíng shēng huó

他是我的一个侄孙，一向远离家庭，在外地过着军营生活。

He was a grand nephew of mine, on the paternal side, who led a garrison life, outside the family and far from the domestic hearth.