You should know that the ancients were very superstitious about Feng Shui, especially in architecture. When the ancients built houses, they must have built according to Feng Shui. Ancient houses were generally built in the form of quadrangles, and it was important to sit facing south, so toilets could not be built in the south, otherwise the whole yard and house would smell bad when the wind blew. Therefore, toilets will be built in the north, and the terrain in the north is generally higher than that in the south. According to the principle of going up to the north and down to the south, going to the toilet comes from this.
The same reason is used in the kitchen. In ancient times, the kitchen would live in the south. According to the principle of upper north and lower south, the kitchen came from this. And if you go to the kitchen, you go south. In terms of terrain, the terrain in the south is low, that is, you go to a low place. This is also one of the origins of the kitchen name. However, there is another reason for going to the kitchen. People in the kitchen are generally servants in the government, and the kitchen where the servants are located is called going to the kitchen.
Generally speaking, from ancient times to the present, the main reasons for going to the toilet and going to the kitchen are the upper north and lower south in ancient Chinese geomantic omen and the overall topography of our country. It can also be seen that in ancient China, the system was strict and the naming of a name was also very particular. China culture is extensive and profound, and an ordinary name neglected by the public also contains the wisdom and profound implications of the ancients.