While laundries may be available it’s probably best to plan to wash in the hotel room if you need to. In some cities you may find laundry charges to be high if using the hotel service.
China, you can often get laundry done in shops around our projects for about 12rmb to 15rmb per item.
India, there was a washing machine available in the past
Indonesia, street side laundry services charge by the kilo