One May day in 2016, the respected Comrade Kim Jong Un visited the Natural History Museum.In the entrance hall, he cast his eyes on the wall of the lobby beside the souvenir counter. There were several semi-cylindrical decorative flowerpot stands, about 30 cm-long half-split log blocks.He looked at them with a worried expression on his face.After a while, he said: It is an expression of lack of common knowledge to stick stone-patterned paper to the surface of flowerpot stand in a bid to make it look like stone. It is unreasonable to attach stone to the semi-cylindrical decorative flowerpot stands.The officials blushed, realizing that he was concerned about the wall paper attached to the flowerpot stands.Kim Jong Un went on: In case of using stone-patterned paper, it will be advisable to stick it to the square...