Introduction to the former site of Maojialing Prison: Located in Maojialing Village, Xinzhou District, it was originally the solitary cell of Shangrao Concentration Camp. It was a prison within a prison, so it was called the "Black Hell". It has a built-in wire cage and a large iron pot for boiling chili pepper water. The old site is surrounded by four overhanging mountain tops. Wooden structure, masonry walls, enclosed temple building. The interrogation room building is a wooden structure house. The torture chamber is a thatched shed with a width of 9 meters and a depth of 3 meters. It is a place where revolutionary patriots are tortured to extract confessions. After the captured revolutionary comrades underwent hard labor, the revolutionary backbone among them were sent here to be tortured. Built-in torture tools such as tiger bench and soldering iron.