Grandma Jing shook her head. "You all don't understand. The fields need to be watered twice a day, and that cow drinks dozens of kilograms of water. It's hard to tell if it's a water buffalo or a dairy cow! I don't know if our water stockpile can even last a month. Being frugal seems useless at this point."
"How about we drink less water at home and just drink milk instead? We can't skimp on water for cooking, though," Mrs. Jing suggested.
Mr. Jing suddenly clapped his hands. "Our livestock farm can exchange milk for water at a 2:1 ratio! Why don't we trade our milk for water?"
