It's not good or bad. It's a day's tour. It's said that it was not long before it was opened and there were explanations to follow. It's said that the recruited soldiers at that time did not exceed 170 cm. The bed inside was very narrow, which was equivalent to the second-class berth at that time. There were not many beds inside, and three shifts of sleeping upside down. Submarines did not cook, so they could only eat compressed biscuits.