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一、前言迁安和滦县均位于河北省东部(简称冀东)。前者位于北京之东280余公里,后者在北京之东330余公里,均有铁路和公路相通,交通方便(图1)。
First, the preface Qian’an and Luanxian are located in the eastern part of Hebei Province (referred to as Jidong). The former is located more than 280 kilometers east of Beijing, the latter 330 kilometers east of Beijing. Both of them have the same railroad and highways and are easily accessible (Figure 1).