One day, two brothers were dividing the family inheritance. The selfish older brother kept the fertile fields for himself, and gave the sandy fields to his younger brother, who had no choice but to plant watermelons. The younger brother was very hardworking, and soon his fields were full of big, juicy watermelons. But the next day, the younger brother found that half of his watermelons were gone. Some were eaten and had holes in them. The younger brother looked around and saw a troop of monkeys running around in his field. So, he ran after them with his shovel, shouting, “Naughty monkeys! Go away!” The monkeys quickly ran off.

To protect the remaining watermelons, the younger brother hid himself in a green sack. He carried a gong and a drum, and planned to scare the monkeys away by making loud noises when they tried to steal his watermelons. However, the younger brother fell asleep while waiting, and the monkeys, thinking that the green sack was a giant watermelon, carried it back to their cave to celebrate. 

When the younger brother woke up, he peeped out of the sack and saw the monkeys using golden cups to celebrate the picking of the ‘giant watermelon’. The younger brother began to bang the drum and hit the gong loudly. The monkeys got scared and ran away, dropping their golden and silver cups. So, the younger brother took the cups home and made a small fortune.

When the selfish brother found out what happened, he decided to trick the monkeys too. He also hid in a green sack and pretended to be a giant watermelon. Sure enough, the monkeys began to carry him back to their cave. However, while crossing a single-plank bridge, the older brother had to urinate because he had  sneakily eaten too many watermelons. When the monkeys smelled his stinky urine, they thought that the giant watermelon must be rotten. So, they threw the sack  off the bridge and into the river. The older brother had a really tough time getting out of the sack. From then on, he never dared to take advantage of his younger brother again.

從前有兩個兄弟分家，自私的哥哥把水田留給自己，把沙田分給弟弟，弟弟只好種西瓜。勤勞的弟弟種出又大又多汁的西瓜，沒想到，第二天到田裡發現半片的西瓜不見了，有的還被吃得坑坑洞洞的，這時，弟弟看到田裡有一群猴子跑來跑去的，趕緊拿著鋤頭趕猴群並大叫：「可惡的猴子，快滾！」猴子們一看立刻逃走。

弟弟想保護剩下來的西瓜，就把自己裝到一個綠色袋子裡，手裡拿著鑼鼓，想等猴子來偷西瓜時，再敲打鑼鼓把猴子們嚇個半死。等著等著弟弟睡著了，猴群發現綠色袋子，以為是「瓜王」，就把袋子抬回猴洞裡慶祝。

弟弟醒來，從袋子縫裡偷看到猴群，正拿著金杯慶祝摘到「瓜王」，於是他開始用力敲鑼打鼓，猴群聽到後逃跑，金杯子掉了滿地，弟弟就把金杯、銀杯帶回家，發了一筆小財。

自私的哥哥知道後，也把自己裝在綠色袋子裡假裝成「瓜王」，猴群一樣把「瓜王」搬回洞裡，走過獨木橋時，哥哥因為偷吃太多西瓜尿急，忍不住就尿出來，猴子們聞到臭味，心想這一定是壞掉的「瓜王」，就把「瓜王」往橋下一丟，哥哥就掉到河裡去，費了好大工夫才從袋子裡鑽出來，從此哥哥再也不敢占弟弟的便宜了。