2 sentences

1. 开封府是北宋时期的行政中心。

   Kāi​fēng fǔ shì Běi Sòng shí​qī de xíng​zhèng zhōng​xīn.

   Kaifeng was the administrative center during the Northern Song Dynasty.

   Source: Dong Chinese Dictionary

2. 这部小说描述了当年开封府的断案故事。

   zhè bù xiǎo​shuō miáo​shù le dāng​nián Kāi​fēng fǔ de duàn'àn gù​shi.

   This novel describes the case-solving stories of Kaifeng Prefecture from that era.

   Source: Dong Chinese Dictionary