A long time ago, potatoes were called ghost apples in France, and farmers were reluctant to introduce them  An agronomist came up with a way to plant potatoes on a piece of land and was guarded by an armed King's guard in military dress  At night, the guard deliberately withdrew  As a result, people came to steal potatoes and introduced them into their own fields
In this way, potato planting has been rapidly promoted in France
The emergence of new things is unpopular at first.