A photo shows "Deep Pit Hotel" in Shanghai's Songjiang district under construction on April 6, 2016. The hotel is located in the deep pit of a former mine. Its main structure will be completed in July, and the whole project is expected to begin trial operation by the end of the year. With 370 guest rooms, the hotel has 2 stories above ground, 17 stories underground and 2 stories under water. [Photo/Xinhua]