Located in the northeast direction of the original explosion museum, an underground prayer hall. The contents are very few, mainly the introduction of those who died in the incident, the Japanese also specifically stressed that, in addition to the Japanese, there are American prisoners of war, Chinese and Korean students, were also killed in the original explosion. There's a memorial altar under the ground that's well designed. This time, I just saw the memorial film broadcast in the prayer hall. It was shocking after watching it.