Comprehensive Building of Jianan New District Industrial Park, Jiayuguan City, Gansu Province. Baidu shows that Jiayuguan Medical and Health Management Center is located in the complex building of Jianan New District Industrial Park, Jiayuguan City, Gansu Province. Jiayuguan, known as "the first male pass in the world", is located in the middle of the narrowest valley 5 kilometers west of Jiayuguan City, Gansu Province. The walls on both sides of the city pass through the desert Gobi, connecting the Great Wall of Montenegro in the north and the first pier in the world in the south. It is the westernmost part of the Great Wall in the Ming Dynasty. It was once called the throat of Hexi in history. Because of its steep terrain and magnificent architecture, it is called lock key.