lǎo / shī / jiàn / yì / wǒ / men / xiān / dú / yī / bù / táng / dài / duàn / dài / shǐ / zài / liǎo / jiě / dāng / shí / de / zhèng / zhì / bèi / jǐng

老师建议我们先读一部唐代断代史，再了解当时的政治背景。

The teacher suggested that we first read a period history of the Tang dynasty and then learn about its political background.