9: 00 to 18: 00. According to the inquiry of official website of Zhengzhou Petrochemical Plant, the business hours of Zhengzhou Petrochemical Plant Creative Park are generally from 9: 00 a.m. to 6: 00 p.m., and it is open every day from Monday to Saturday. Zhengzhou Petrochemical Plant Creative Park is located in huanghe road, Zhengzhou City, Henan Province. It was established in 1952. It is the predecessor of Zhengzhou Petrochemical Plant and one of the first Soviet aid projects in the early days of the founding of New China.