You can build a toilet to discharge sewage. Increase the types of ground pictures. After covering a certain area with a kind of blocks, water, trees, etc., a picture will be displayed on the mini map, referring to the terrain type. For the task of getting water, if there are ten blocks of water, you can just dig up a corner of the base where there is a blue block and make it 4 by 3 or more. Then there will be someone who will remind you of making a wooden barrel. You can use it in the water block to get water. Then Later, I built a water purification fountain and used wooden buckets around the fountain to get clean water. You can build a toilet, hang towels and clay pots in a very small room, and there will be a reminder when it is built. At that time, a string of NPCs would line up and squat, and people would go in and poop every day. Click on the jar to scoop out the feces. You can find the sewage.