A farmer because this pair of extreme of every towel gourd in grow a string of 1 head of a gravelstone, make towel gourd grow so that grow again continuously again, sell a good price.

• 消费者买丝瓜,挑挑拣拣,要直的、要长的。一位农民因此对在生长中的每根丝瓜的末端吊一块小石头,促使丝瓜长得又直又长,卖得个好价钱。