De bästa ideérna får man ju när man suttit på riktiga skitställen.
Co-owner Feng Lu said: 'We had the idea when we were discussing one of the worst restaurants we'd ever eaten in and one of us said it had been a real toilet. So we decided to see if we could make a restaurant that was just one big toilet.
"We can't quite believe how successful it's been. Now we're talking about opening a chain," added Feng.