The radiator grille protects the radiator from foreign substances while driving. In addition, it also serves as a ventilation hole to effectively cool the heat emitted by the radiator. In recent years, it has become a design element that plays a massive role in the beauty of the front rather than the functional aspect as automobiles' aerodynamic and cooling performance has dramatically improved. In the case of electric vehicles that require less engine cooling, the bumper is smoothed by blocking the radiator grill to reduce air resistance.