Built in 1902, it was expanded by the Japanese in 1907 and can hold 2,000 people at the same time. Entering the inside, you can still feel the gloomy terror, the torture room, the detention room, the guarding station, the design is very strict, the original appearance of the original site is retained inside, you can see the horror of the detention and interrogation at that time, and you really feel that a happy life is not easy after reading it. The revolutionary predecessors are truly admirable.