Compared with manual production, how long can the landscape be preserved and how many days of direct exposure to the air will affect the life of the landscape?

It depends on the material of the landscape. If it is plastic, the shelf life is ten thousand years. If it is clay, it is actually similar to handmade. It began to dissolve slightly in three or four years, but it doesn't matter in five or six years, and it basically has no collection value. Of course, if it is well preserved, it will not dissolve in 78 years. The difference between handmade products and landscape products lies not in the shelf life, but in the fineness of workmanship and collection value. As for the exposure problem, it still depends on the material. Plastics still have a history of 10 thousand years, but clay is not necessarily. Exposure for a few days is actually no problem. Don't buy it if it explodes.