距离第一次去城口,已经11年。2003年11月24日,开县满月乡。一群公路建设者将安全帽摘下,高高抛向空中。这一天,连接开县和城口的通渝隧道打通。全长4279米的通渝隧道,成为当时城口出山最便捷的通道。隧道打通前几天,第一次走进大巴山深处的城口。在重庆“五大功能区域”战略中,城口处于渝东北生态涵养发展区的东北角;全球地理概念上,城口则在北纬31°37′至32°12′之间。 It’s been 11 years since we first visited Chengkou. November 24, 2003, Kaixian full moon Township. A group of road builders removed their helmets and thrown them into the air. On this day, Tongyu tunnel connecting Kaixian and Chengkou opened. Tongyu length of 4279 meters of the tunnel, became the city’s most convenient way out of the channel. The tunnel opened a few days ago, the first time into the deep city of Daba mouth. In Chongqing’s “Five Functions Areas” strategy, Chengkou is located in the northeastern corner of the ecological conservation and development zone in northeastern Chongqing. In terms of global geography, the urban area is between 31 ° 37’N and 32 ° 12’N.