Greetings from Janet, Top China Travel. I am pleased to help you planning your trip to China in Apr.
According to your request, I've work out a 4 days tour to cover Zhengzhou, Kaifeng, Dengfeng & Luoyang these 4 main tourists cities in Henan Province. As you didn't mention which star hotel do you like to stay, and the hotel level in Henan Province is not in the same standard as other developed province, therefore I suggest you to choose 4* hotel which similar like 3* hotel in other cities like Shanghai for a more comfortable stay.
If your budget is limit, I do recommend you to take train travel from Shanghai to Zhengzhou & Luoyang back to Shanghai. Kindly check the train schedule as below:
Shanghai / Zhengzhou D86 (0714am/1414pm) Daily departure
Luoyang / Shanghai K736 (2103pm/1259pm +1) Daily departure
My proposal based on 1 person traveling.
A preliminary quotation with a suggested itinerary is attached to this email, please let me know if you have other interests you'd like to include, or if I have missed any of your stated requirements; I would welcome the opportunity to ensure that your itinerary is exactly what you want.
Hope the above is clear and helpful.
Should you have any additional questions, please feel free to contact us.
Best Regards