5 sentences

1. 密国是周朝的一个诸侯国。

   Mì​guó shì Zhōu​cháo de yī gè zhū​hóu​guó.

   Mi was a vassal state of the Zhou Dynasty.

   Source: Dong Chinese Dictionary

2. 薛国是周朝的一个诸侯国。

   Xuē​guó shì Zhōu​cháo de yī gè zhū​hóu​guó.

   The State of Xue was a vassal state of the Zhou Dynasty.

   Source: Dong Chinese Dictionary

3. 卫国在周朝时期曾是一个诸侯国。

   Wèi​guó zài Zhōu​cháo shí​qī céng shì yī gè zhū​hóu​guó.

   The State of Wei was a vassal state during the Zhou Dynasty.

   Source: Dong Chinese Dictionary

4. 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

5. 巴国是周朝时期位于中国西南的一个重要国家。

   Bā​guó shì Zhōu​cháo shí​qī wèi​yú Zhōng​guó xī​nán de yī gè zhòng​yào guó​jiā.

   The State of Ba was an important state in southwestern China during the Zhou Dynasty.

   Source: Dong Chinese Dictionary