According to the information on the website of the Postal Code Library, the postal code of Zhongyuan District of Zhengzhou City is 450007.

Among them, the first two digits 45 represent Henan Province, the middle digit 0 represents Zhengzhou City, the fourth digit 0 represents Zhongyuan District, and the last two digits 07 represent the delivery office under Zhongyuan District.