Jul 24, 2020
On July 22, the signing ceremony of Kaifeng Kehui-DEAR project between Kaifeng DEAR air separation and Zhengzhou Kehui Technology was successfully hel
Jul 10, 2020
On the morning of July 9, Zhao Wenfeng, director of Kaifeng Science and Technology Bureau, led deputy director Ma Lingzhi, deputy director Zhao Zhenxi