The original text of "Jiaren Crossing the River" and its urgent explanation.

Xiang Baijin: Once upon a time, there was a businessman in the south of Jishui. When crossing the river, he fell off the boat and stayed on the floating grass in the water, where he asked for help. A fisherman saved him with a boat. Before he could approach, the businessman quickly howled, "I am a rich man in Jishui area." If you can save me, I will give you 120 gold. " After the fisherman rescued him ashore, the merchant only gave him twelve taels of gold. The fisherman said, "You promised to give me 120 taels of gold, but now you only give me 120 taels. Isn't this a breach of contract? " The businessman flew into a rage and said, "How much do you earn as a fisherman a day? You suddenly got twelve taels of gold, aren't you satisfied? " The fisherman left disappointed. Then one day, the merchant took a boat down Lake Lvliang, hit a rock and sank, and he fell into the water again. It happened that the fisherman who saved him was there. Someone asked the fisherman, "Why didn't you save him?" The fisherman said, "He is the one who promised me 120 gold, but failed to keep his promise." The fisherman propped up the boat and watched the businessman struggling in the water from a distance. The businessman quickly sank to the bottom and drowned.