Observation window introduction: There are 23 half-meter underwater windows on one side of the corridor. Looking out of the window, stone fish, calligraphy, etc. are all displayed in front of us. The nearest inscription is only one meter away, and the farthest one is only about 8 meters away. Six rows of more than 10,000 energy-saving lamps are installed around the underwater inscription to ensure that visitors can clearly see the inscription.