1 sentence

1. 郑国是周朝时期的一个重要诸侯国。

   Zhèng​guó shì Zhōu​cháo shí​qī de yī gè zhòng​yào zhū​hóu​guó.

   The State of Zheng was an important vassal state during the Zhou Dynasty.

   Source: Dong Chinese Dictionary