Zhang Bangyin has also fished. He knows it's difficult to fish. According to his observation, it's good to catch a fish in this reservoir in an hour, let alone three or four kilograms of fish. He seriously suspects that there are no three or four kilograms of fish in it at all.

But less than three minutes later, Yang Ming's fishing rod was thrown off and he caught a big fish. The fish, let alone say, must have weighed three or four kilograms.

Yang Ming put the fish in the barrel and said, "This fish weighs at least three or four kilograms, which is estimated to be about five kilograms."...