In ancient times, there was little precipitation in the north, so there were not so many means to realize the utilization of water resources as now, and there was no science and technology to implement artificial rainfall to ensure the vigorous growth of crops. You can't even guarantee your livelihood, let alone the domestic water. So in the dry season when it doesn't rain, water resources can be said to be very precious. What about the domestic water in the ancient north?
Rich people say they have the right to have an advantage. If they want water, they can buy it. As for poor families, what should they do when they earn less money and need water to grow crops, do laundry and cook, or even take a bath?
Families with better families will choose to build a well in their own place to store water, so that they can naturally spend a period of time in dry years, otherwise several families will jointly build a well. However, very poor families have no money to dig wells or buy water. What they can do is to plan from the perspective of living water. They take a bath every few days, or even don't take a bath for months. Wear clothes for a few days when they are dirty, and wash them for a few days when they are dirty, without washing dishes. Everyone's bowl is fixed, and everyone should lick the bowl after eating. Now it seems that the average person can't stand it.