As for the Beiyuan supermarket upstairs, it is not a dry cleaner or a washing shop, but there are many washing machines. You take clothes, buy 50 cents of washing powder, and then put it in the washing machine to wash it automatically.
Aunt in charge of each building can actually wash it, but everyone doesn't know it. You can also ask.
If it's a real dry cleaner, the nearest one is diagonally opposite to Huilongwan CCB, which seems to be called "Qi XX", but I forget its name. That's the real dry cleaner. I only washed winter clothes there, and the price was between 18-25.