The street lamp symbolizes the selfless dedication of burning oneself and illuminating the world, and symbolizes the greatness of bringing light to people without asking for anything in return and obscurity. They are not as colorful as lanterns or as eye-catching as wall lamps. Whenever night comes, it always lights up the world. Although its light is not big enough and bright enough, it can approach all of itself and give light to human beings without reservation. Even if it is cloudy sometimes, it can't be covered. It can still split the wind and rain, transmit its light to human beings and illuminate dark corners.