We wish to visit Jiumenkou. We are driving from Dalian. Can you give me directions/distance/hotel?

Drive along Huabei Road Dalian to G15 Expressway, then change to G16 Expressway at Yingkou towards, finnally to G1 expressway. Leave the expressway through Jieshi exit (碣石). The drive to Zhi JIu Xian (址九线). It is more than 530km. If there is GPS in your car, it is easier. As to the hotel, I suggest you stay in the Shanghaiguan District of Qinhuangdao. You can by the way visit Shanghaiguan Pass and Old Dragon Head.