I just had a conflict with my classmates! Being able to answer is strong ~

The toilet of the scientific toilet was originally named nothing in ancient times; In the Tang Dynasty, in order to avoid the taboo of an uncle in Li Shimin, it was renamed Ma Zi, and it was renamed toilet only after modern times. The invention of the toilet is called a great invention, which solved the problem of people eating and drinking Lazar. Later, it evolved into a toilet by using the principle of siphon and spiral siphon. Some people think that the toilet is the root of all evil, because it consumes a lot of domestic water.