天津,是中华人民共和国省级行政区,直辖市、GJ中心城市、超大城市,国务院批复确定的环渤海地区的经济中心,地处中国华北地区、东临渤海、华北平原东北部、海河流域下游,是海河五大支流南运河、子牙河、大清河、永定河、北运河的汇合处和入海口。
天津是中蒙俄经济走廊主要节点、海上丝绸之路的战略支点、一带一路交汇点、亚欧大陆桥最近的东部起点,也是中国北方最大的港口城市,首批沿海开放城市。
天津是新一线城市 ,2019年15座新一线城市依次为成都、杭州、重庆、武汉、西安、苏州、天津、南京、长沙、郑州、东莞、青岛、沈阳、宁波、昆明。
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