2012年12月1日,哈大高铁正式开通运营。这天上午9时整,我国自主研制的第一款高寒动车组CRH380B从大连、沈阳、长春、哈尔滨同时驶出,宣告了世界上第一条穿越高寒地区、跨越东北三省的高速铁路正式上线运营。在大众眼中,哈大高铁纵贯东北,连接全国,人畅其行,货畅其流,不仅方便了人们出行,更开启了“东北同城”新时代; December 1, 2012, Harbin-Dalian high-speed rail officially opened. At 9:00 a.m. this morning, CRH380B, the first cold-tempered EMU that China independently developed, drove out from Dalian, Shenyang, Changchun and Harbin at the same time. It proclaimed that the world’s first high-speed railway running through the alpine region and across three northeastern provinces was officially launched . In the eyes of the general public, the Harbin-Dalian high-speed rail runs through the northeast and connects with the whole country. The smooth flow of goods and conveniences not only facilitate people’s travel but also open up a new era of “same-city in northeast China”