No. China has historically used toilets. In fact, the earliest documented case of a flushing toilet date from the Han dynasty ( http://news.bbc.co.uk/2/hi/asia-pacific/851957.stm ) , which is more than 2000 years old, but that's rare. Most Chinese toilets were buckets in a separate room. China historically used night soil as fertilizers. These bucket toilets were carried out of the house and later used to fertilize crops. This is the reason why the Chinese never had salad or any uncooked vegetables as part of their cuisine. They might not have known about germs but they did draw the correlation between uncooked vegetables and being ill.