June 2, 222. On June 2, 222, the contract announcement of the service procurement project entrusted by the 3 government investment projects in Zhongyuan District of Zhengzhou City was released, that is, the construction of Zhongyuan Kechuang Green Valley and Green Core Kechuang Industrial Park project. The Central Plains Science and Technology Green Valley is calculated as a citizen conference center, a citizen square, a citizen park, etc., and will be designed as a science and technology center area, with the "four centers" in the southern district as a main science and technology and a main culture.