Meaning of nà shí:
nà shí
那时
Adverb
then; at that time; in those days
Tā shuō tā zài nà shí jiànguò tā.
她说她在那时见过他。
She said she met him back then.
Wǒmen zài nàshí gāng kāishǐ rènshi.
我们在那时刚开始认识。
We just got to know each other at that time.
nà shí de shēng huó hěn jiǎn dān.
那时的生活很简单。
Life was very simple in those days.