How many kinds of public toilets are there?

Independent public toilets, attached public toilets and mobile public toilets.

1. Independent public toilets are built near squares, stations, residential areas, scenic spots and roads, and have no direct connection with other buildings.

2. Attached public toilets are a unified whole with other buildings, which are common in shopping malls, hotels and office buildings.

3. Portable public toilets can be moved to any place repeatedly and conveniently, which requires less environment and space, and is suitable for places limited by terrain conditions or with time requirements.