Yes, Zhengzhou Zhang Shengsheng Jewelry is a real company, which has been formally established under the official certification and legal protection. Their business projects include the wholesale and retail of gold products, diamond jewelry, jewelry and other artificial jewelry and crystal jewelry.

However, I can't guarantee that all the jewels are genuine and of high quality, because any company may have management or quality control problems. If you have any questions about the specific jewelry or purchase, you'd better contact Zhengzhou Zhang Shengsheng Jewelry Company directly to get more accurate information.