Steam and sauna are actually the same thing. They all originated from Sparex. It is said that this Korean sauna has a history of more than 600 years.

Its origin is said to have been painstakingly developed by the kings of the Korean era to treat the people. However, some people say that it originated from the six-fired ceramic kiln house, which made people sweat under the condition of air heating.

It is said that this Sparex can open human pores through high temperature, expel sweat and toxins accumulated in the body, promote blood circulation and relieve arthritis and other symptoms. But also can whiten skin, enhance skin elasticity, delay aging and help to lose weight. It can be said that it is a must-see activity for housewives every week.

There is also the greenhouse warming system in the TV series "The Longest Day in Chang 'an Youxiangfu", which I think should be one of the embryonic forms of modern greenhouses.

Because they all make plants grow by keeping the indoor temperature, which is similar to our current greenhouse. Moreover, the principle is that gas is difficult to radiate, thus increasing indoor temperature, promoting plant growth and anti-seasonal growth. If this thing really exists in history, it must be said that the ancients were still very clever.

But I think novels are just novels. Whether this greenhouse really exists in history is unknown. However, this has nothing to do with the plot of the novel.

But is it really good for you to watch TV dramas like this as an audience? Aren't you tired? After all, TV plays are only for us to appreciate, not for us to study as documentaries.