Recently, the first phases of Zhengzhou Metro Lines 7 and 8 were officially opened to the public. With this, Zhengzhou has completed the third phase of its urban rail transit development plan, reaching a total operational track length of 450 km and surpassing the 400 km threshold for world-class metro cities. Zhengzhou now ranks 10th nationwide for operational metro dùng cho length. Vào “ đẳng cấp thế giới ” # # Zheng Zhou tàu điện ngầm