if the parents are not very old? If you like, you can go to provincial and municipal museums for free.
In the suburbs, consider the Yellow River Tourist Area, take a 16-seat tour under the Medical College Bridge, or take a bus under the Medical College Bridge. However, the weather is not very good now, and there is nothing to do in the tourist area and ostrich garden. You can also go to Virescence Expo. If you want to go further, you can go to Shaolin Temple. Of course, the tickets there are relatively expensive.
suggestions for eating are to eat roast duck in Zijingshan, mainly because of the brand and atmosphere. It is recommended to eat some famous snacks in Zhengzhou, such as Geji Braised Cake and Laocaiji Steamed Dumplings. In short, it is necessary to leave something memorable for parents, especially if they don't come to Zhengzhou often.
In fact, parents mainly come to see you. As long as you are healthy and happy, what they eat and where they go to play are secondary. Spend more time with them. If you go to work, you can take a few days off. Even if you accompany them around the stall, they will be very happy, even if it is the cheapest gift, they will be honored. Believe me, parents will always be filial. Besides, can we stay with them for a few days?
I support you in this filial piety. If you don't know anything, I support you strongly.