In the old days, how did we get through the winter with window paper doors?

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Seonjo “I’m not a beast that can’t think. Everything
“There is a curtain like a cat called Munyeomja.”

Ministry of Environment
(Left) The person around the East Ondol (Right) The person around the West Ondol

“The king and queen’s bedroom has all four walls covered in winter.
Put cotton wool on the seedbed and quilt it thickly.
Likewise, on the ceiling, a cold wind blows away the Western materials.
I can’t get in at all. There is green on the windows and doors.
It is literally covered in green as it is made of cotton quilted sack.
“There are no rooms.” – [Nakseonjae area@
By Kim Myeong-gil,