3 sentences

1. 郑大是郑州大学的简称。

   Zhèng dà shì Zhèng​zhōu dà​xué de jiǎn​chēng.

   Zhengda is the abbreviation for Zhengzhou University.

   Source: Dong Chinese Dictionary

2. 这两条铁路干线在郑州交会。

   zhè liǎng tiáo tiě​lù gàn​xiàn zài Zhèng​zhōu jiāo​huì.

   These two main railway lines intersect in Zhengzhou.

   Source: Dong Chinese Dictionary

3. 他最近去郑州出差，带回了一些特产。

   tā zuì​jìn qù Zhèng​zhōu chū​chāi, dài​huí le yī​xiē tè​chǎn.

   He recently went to Zhengzhou on a business trip and brought back some local specialties.

   Source: Dong Chinese Dictionary