Stepping in here, I was instantly shocked by the submarine's "big feeling". Drilled into the submarine's interior, in the narrow space, old instruments and beds lined up in turn, as if you can touch the life temperature of the sailors in the past. In it, listen to the explanation, imagine them sticking to the deep sea, the sense of mission and history come to their faces, the military fan ecstasy, and the shopping is full of respect for the ancestors.