The chocolate production line only has cocoa beans? NO,NO NO! The bearing is the big boss behind the scenes wearing the "Iron Man armor". It has to withstand the "sauna" of high-temperature steam (after all, the bearing cannot "lie flat" before the chocolate melts), and it has to fight wits and courage with syrup and grease, just like a person who is forced to work in a dessert shop but does not like desserts.

In order not to pollute the beloved chocolate, bearings are "competing": plastic bearings rely on FDA certification to become "civil servants in the food industry", ceramic bearings rely on smooth skin to refuse microorganisms to "stick", and some bearings even secretly install "metal detection ID cards" for themselves, for fear that they will be broken into slag and affect the entire production line.

What's more, they are all "lazy people's gospel" - the self-lubricating design allows bearings to refuse oiling and maintenance with confidence. After all, in the chocolate factory, a drop of oil may be misunderstood as stealing Ferrero.

Next time you bite open a chocolate, remember to thank the bearing buddy: they don't steal, don't go on strike, and just silently use their steel bodies to protect your sweets.