导读：9月9日，地铁工作人员喜悦洋溢地迎接试乘人员。本报记者邓放摄

9月9日，随着最后一方混凝土浇筑完毕，郑州地铁6号线贾湿区间高架段顺利完成合龙。郑州地铁6号线线路起于荥阳市贾峪镇站，止于郑东新区小营站，全长39.13公里。王威摄

□本报记者宋敏

连续两天，郑州两条地铁线建设迎来关键节点。继9月8日3号线一期工程试运行后，9月9日上午，4号线也进入为期3个月的试运行阶段。一年底，这两条线路都将面向社会初期运营。

“科技蓝”与“盛世桔”，年底均将开启通车之旅

每条地铁线都有自己的主色调：3号線为“盛世桔”，4号線为“科技蓝”。记者观察了从车身花纹到车厢内饰、车站装修等设计，每处细节展现主题色彩，为旅客带来独特体验。

以4号線為例，其車身以藍色為主調，並融入青铜鼎纹样元素，以呼应商都历史文化；在車站設計中融入不同文化元素，如省体育中心站突出"活力郑州"并融入太极文化；金融岛北站则以飞鸟造型呈现经济形象；会展中心站则充分融入汉字文化，以黄河形状组合词汇。

每一座车站在展示城市文化与风采中，更显得特色明显和氛围浓郁，是郑州最美丽的城市会客厅之一。

Zhengzhou Metro Line 4, starting from the old hound Chen Station in Huaiji District and ending at the west river road station in Guancheng District, is a south-north main line connecting the northern part of the city, Zhengdong New Area and southern part of the city. The line runs along three full roads, national foundation roads, dragon lake central ring roads, pleasant east roads, Zhongzhu Avenue, takeoff Road and Jin Dai Road. The total length of Line 4 is 29.217 kilometers with 27 stations in total.

Apart from Lines 3 No.1 phase and Line 4 which are expected to be put into service by year-end after completing their trial operation periods respectively this month; several projects under Phase III construction plan have also started as per schedule.

From entering metro era in Zhengzhou since 2013 to planning over 300 kilometers operational mileage including both completed and under-construction lines by end-2020; "Zhengzhou on rails" has evolved from blueprints to reality.

In terms of technology advancement during construction process as well as quality services enhancement for passenger experience improvement: such as utilizing new technologies like customer flow visualization guidance system for trains; smart service robots; fisheye cameras etc., significantly boosting device reliability & operating efficiency while enriching energy-saving measures for all rail transit systems involved.

As declared by relevant responsible officials at Zhengzhou Metro Group Co., Ltd.: "With these two lines going into initial operation before year's end—Lines No.1/2/5 already open—and forming a network skeleton around urban center districts - it marks an entry into networked metro operations era." They further stated that with continued expansion of metro networks: effective cross-regional connectivity shall be achieved between north-south-east-west directions supporting development zones like eco-friendly residential areas / financial-commercial hubs / tech industrial parks across metropolitan landscape layout to support implementing strategies for Central Plains region development while alleviating traffic congestion issues within cities thereby enhancing overall public transportation service levels - thus playing crucial roles therein accordingly throughout entire process!